4-[[5-(anilino)carbonyl-2-methoxyphenyl]azo]-3-hydroxy-N-(3-nitrophenyl)naphthalene-2-carboxamide

Endpoint summary

Description of key information

Acute oral toxicity: 

The acute oral toxicity dose (LD50) was considered based on different studies conducted on rats for the test chemical. The LD50 value is >2000 mg/kg bw, for acute oral toxicity. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute oral toxicity.

Acute Inhalation Toxicity:

The acute inhalation toxicity study need not be conducted because exposure to humans via inhalation route is not likely taking into account due to the low vapour pressure of the test chemical, which is reported to be 1.93E-021 Pa. Thus, exposure to inhalable dust, mist and vapour of the chemical is highly unlikely. Therefore this study is considered for waiver. 

 

Acute Dermal toxicity:

The acute dermal toxicity dose (LD50) was considered based on different studies conducted on rats for the test chemical. The studies concluded that LD50 value is >2000 mg/kg bw, for acute dermal toxicity. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute dermal toxicity.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Remarks:

experimental data from various test chemicals

Justification for type of information:

Data is summarized based on the available information from various test chemicals.

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Qualifier:

according to guideline

Guideline:

other: As mentioned below

Principles of method if other than guideline:

WoE report is based on 3 acute oral toxicity studies as - WoE 2, WoE 3 and WoE 4.
Acute Oral toxicity test was carried out to study the effects of the test chemicals on rodents.

GLP compliance:

not specified

Test type:

other: not specified

Limit test:

no

Species:

rat

Strain:

other: 1. Crj: CD(SD) IGS, SPF 2. Sprague-Dawley 3. Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

1. TEST ANIMALS
- Source: Charles River Japan Co., Ltd.
- Age at study initiation: 5 weeks old
- Weight at study initiation: The body weight ranged from 116 to 127 g for males and 106 to 124 g for females.
- Fasting period before study: Rats fasted for about 17 hours from the day before administration.
- Housing: 5 animals (same sex) were housed and raised in polycarbonate cages spread with experimental animal bedding.
- Diet (e.g. ad libitum): solid feed
- Water (e.g. ad libitum): Freely ingested tap water irradiated with ultraviolet rays after filter filtration with a pore size of 5 μm.
- Acclimation period: 5 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 2 ° C
- Humidity (%): 55 ± 15%
- Air changes (per hr): ventilation at about 12 times / hour
- Photoperiod (hrs dark / hrs light): lighting 12 hours / day (7: 00-19: 00).
2. TEST ANIMALS
- Source: National Institute of Biosciences, Pune.
- Females (if applicable) nulliparous and non-pregnant: yes
- Age at study initiation: Female rats of the age of approximately 8 to 12 weeks old were used at the commencement of its dosing
- Weight at study initiation: Body weight range was 190.9 to 202.2 grams.
Body weights at the start : Female Mean: 197.80 g (= 100 %); Minimum : 190.9 g (- 3.49 %); Maximum : 202.2 g (+ 2.22 %)
- Identification: Each female rat was individually identified by the picric acid marking.
- Fasting period before study: Approximately 16 hours or more.
- Housing: The rats were housed in polycarbonate cages.
- Diet (e.g. ad libitum): Rodent feed supplied by the Nutrivet Life Sciences, Pune, was provided ad libitum from individual feeders.
- Water (e.g. ad libitum): Water was provided ad libitum from individual bottles attached to the cages. All water was from a local source and passed through the reverse osmosis membrane before use.
- Acclimation period: 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20.6 to 22.7 degree centigrade.
- Humidity (%): 55.6% to 58.3%.
- Air changes (per hr): Ten to fifteen air changes per hour.
- Photoperiod (hrs dark / hrs light): An artificial light and dark cycle of 12 hours each was provided to the room.

IN-LIFE DATES: 20-10-2016 to 22-11-2016
3. TEST ANIMALS
- Source: National Institute of Biosciences, Pune.
- Females (if applicable) nulliparous and non-pregnant: yes
- Age at study initiation: Female rats of the age of approximately 8 to 12 weeks old were used at the commencement of its dosing
- Weight at study initiation: Body weight range was 199.7 to 211.6 grams.
Body weights at the start : Female Mean: 204.95 g (= 100 %); Minimum : 199.7 g (- 2.56 %); Maximum : 211.6 g (+ 3.24 %)
- Identification: Each female rat was individually identified by the picric acid marking.
- Fasting period before study: Approximately 16 hours or more.
- Housing: The rats were housed in polycarbonate cages.
- Diet (e.g. ad libitum): Rodent feed supplied by the Nutrivet Life Sciences, Pune, was provided ad libitum from individual feeders.
- Water (e.g. ad libitum): Water was provided ad libitum from individual bottles attached to the cages. All water was from a local source and passed through the reverse osmosis membrane before use.
- Acclimation period: 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20.8 to 22.7 degree centigrade.
- Humidity (%): 55.6% to 58.1%.
- Air changes (per hr): Ten to fifteen air changes per hour.
- Photoperiod (hrs dark / hrs light): An artificial light and dark cycle of 12 hours each was provided to the room.

IN-LIFE DATES: 20-10-2016 to 26-11-2016

Route of administration:

oral: gavage

Vehicle:

other: 1. CMC (carboxymethyl cellulose) 2. water 3. water

Details on oral exposure:

1. VEHICLE
- Amount of vehicle (if gavage): 20 mL / kg
- DOSAGE PREPARATION (if unusual): The test substance was suspended in a medium containing 0.1% Tween 80 added 0.5% CMC-Na aqueous solution.
2. VEHICLE
- Concentration in vehicle: 300 mg/kg, 300 mg/kg, 2000 mg/kg and 2000 mg/kg
MAXIMUM DOSE VOLUME APPLIED: 10 ml/kg body weight.
3. VEHICLE
- Concentration in vehicle: 300 mg/kg, 300 mg/kg, 2000 mg/kg and 2000 mg/kg
MAXIMUM DOSE VOLUME APPLIED: 10 ml/kg body weight.

Doses:

1. 0, 500, 1000 and 2000 mg/kg
2. Dose Group I : 300 mg/kg
Dose Group I : 300 mg/kg
Dose Group II : 2000 mg/kg
Dose Group II : 2000 mg/kg
3. Dose Group I : 300 mg/kg
Dose Group I : 300 mg/kg
Dose Group II : 2000 mg/kg
Dose Group II : 2000 mg/kg

No. of animals per sex per dose:

1. Total = 30 (sex/dose)
2. Three females were used at each step.
3. Three females were used at each step.

Control animals:

other: 1. yes, Total = 10 (Male/Female) 2. not specified 3. not specified

Details on study design:

1. - Duration of observation period following administration: 14 days
- Frequency of observations: Mortality and general condition were observed over 4 days, 30 minutes, 1, 3 and 6 hours after
administration, once a day for 14 days, thereafter; and weighing: Body weight was measured using an epple dish balance on days 4, 8 and 15 immediately before administration.
- Necropsy of survivors performed: yes
- Other examinations performed: Animals were observed for clinical signs.
2. - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Twice daily
- Necropsy of survivors performed: Yes
- Other examinations performed:
Clinical Observations and General Appearance: Animals were observed for clinical signs, mortality and morbidity, until sacrifice.
Onset, duration and severity of any sign were recorded. The clinical signs and mortality observations were conducted at immediately (0 to 5 minutes), 5, 10, 30, 60 minutes, 2, 4 and 6 hours on the day of dosing and once daily thereafter for 14 day. Daily observation was done as far as possible at the same time.
The observations were included general clinical signs, observations of eyes, mucous membranes, respiratory, circulatory system and behavior pattern.

Body weights: Individual animal body weights were recorded, before fasting, prior to administration of the test item (fasting body weights), weekly thereafter and at termination on day 14. Weight changes were calculated and recorded.

Gross Pathology: Necropsy was performed on all animals at the end of the study period on day 15. Macroscopic examination of all the orifices, cavities and tissues were made and the findings were recorded. All animals surviving the study period were sacrificed by the carbon dioxide asphyxiation technique.

Histopathology: No gross abnormalities were observed in animals sacrificed terminally hence, no histopathology was performed.
3. - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Twice daily
- Necropsy of survivors performed: Yes
- Other examinations performed:
Clinical Observations and General Appearance: Animals were observed for clinical signs, mortality and morbidity, until sacrifice.
Onset, duration and severity of any sign were recorded. The clinical signs and mortality observations were conducted at immediately (0 to 5 minutes), 5, 10, 30, 60 minutes, 2, 4 and 6 hours on the day of dosing and once daily thereafter for 14 day. Daily observation was done as far as possible at the same time.
The observations were included general clinical signs, observations of eyes, mucous membranes, respiratory, circulatory system and behavior pattern.

Body weights: Individual animal body weights were recorded, before fasting, prior to administration of the test item (fasting body weights), weekly thereafter and at termination on day 14. Weight changes were calculated and recorded.

Gross Pathology: Necropsy was performed on all animals at the end of the study period on day 15. Macroscopic examination of all the orifices, cavities and tissues were made and the findings were recorded. All animals surviving the study period were sacrificed by the carbon dioxide asphyxiation technique.

Histopathology: No gross abnormalities were observed in animals sacrificed terminally hence, no histopathology was performed.

Statistics:

1. not specified
2. not specified
3. not specified

Preliminary study:

1. not specified
2. not specified
3. not specified

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

1. No mortality was observed.
2. Group I Step I : Animals treated at the dose level of 300 mg/kg body weight: All animals survived through the study period of 14 days.
Group I Step II : Animals treated at the dose level of 300 mg/kg body weight: All animals survived through the study period of 14 days.
Group II Step I : Animals treated at the dose level of 2000 mg/kg body weight: All animals survived through the study period of 14 days.
Group II Step II : Animals treated at the dose level of 2000 mg/kg body weight: All animals survived through the study period of 14 days.
3. Group I Step I : Animals treated at the dose level of 300 mg/kg body weight: All animals survived through the study period of 14 days.
Group I Step II : Animals treated at the dose level of 300 mg/kg body weight: All animals survived through the study period of 14 days.
Group II Step I : Animals treated at the dose level of 2000 mg/kg body weight: All animals survived through the study period of 14 days.
Group II Step II : Animals treated at the dose level of 2000 mg/kg body weight: All animals survived through the study period of 14 days.

Clinical signs:

other: 1. Clinical signs such as, red feces exhibiting the same color tone as the test substance were found between 6 hours and 3 days after administration in males and females of the test substance - administered group, and in all the sexes on the 2nd day. In a

Gross pathology:

1. Diaphragmatic hernia in the thoracic cavity was found in one female in the 1000 mg/kg group. In the hernia, the caudate portion of the liver protruded nodularly into the thoracic cavity, a part of which was adhered to the chest wall. Since this change was expressed only in one case and not related to the dose, it was judged as a contingent finding. No other abnormality was found.
2. Gross pathological examination did not reveal any abnormalities in animals from 300 mg/kg and 2000 mg/kg dose groups.
3. Gross pathological examination did not reveal any abnormalities in animals from 300 mg/kg and 2000 mg/kg dose groups.

Other findings:

1. not specified
2. not specified
3. not specified

Interpretation of results:

other: Not classified

Conclusions:

According to CLP regulation, the test chemical cannot be classified for acute oral toxicity, as the LD50 value is >2000 mg/kg bw.

Executive summary:

In different studies, the given test chemical has been investigated for acute oral toxicity to a greater or lesser extent. Often are the studies based on in-vivo experiments in rodents, i.e. most commonly in rats for test chemical. The studies are summarized as below –

 

Acute oral toxicity study of the given test chemical was conducted in 40 Crj: CD (SD) IGS, SPF male and female rat at the concentration of 0, 500, 1000 and 2000 mg/kg bw. The test substance (Purity - >99 %) was suspended in a medium containing 0.1% Tween 80 added 0.5% CMC-Na aqueous solution as 20 mL/kg.

Mortality and general condition were observed over 4 days, 30 minutes, 1, 3 and 6 hours after administration, once a day for 14 days, thereafter. Body weight was measured using an epple dish balance on days 4, 8 and 15 immediately before administration. Animals were observed for clinical signs.

No death occurred in both males and females. Clinical signs observed such as, red feces exhibiting the same color tone as the test substance were found between 6 hours and 3 days after administration in males and females of the test substance - administered group, and in all the sexes on the 2nd day. In addition, the coloration of the coat considered to originate from this red flavor was observed in males and females of the test substance-administered group between the 2nd and 4th days. But no abnormality considered to be a toxicity change was observed. No abnormality was found in body weight of animals. Diaphragmatic hernia in the thoracic cavity was found in one female in the 1000 mg/kg group. In the hernia, the caudate portion of the liver protruded nodularly into the thoracic cavity, a part of which was adhered to the chest wall. Since this change was expressed only in one case and not related to the dose, it was judged as a contingent finding. No other abnormality was found.

Therefore, the acute oral LD50 value was considered to be >2000 mg/kg bw, when Male and female SD rats were treated with the given test chemical via oral route.

The above study is supported with another study mentioned in study report to determine the acute oral toxicity profile of the given test chemical as per OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method) in Sprague Dawley rats.

Initially, three female animals were treated at the dose level of 300 mg/kg body weight of the test item (Step - I). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality at 24 hours after the dosing. As no mortality was observed at 24 hours after the dosing, three female animals were added to the study and treated with the same dose of 300 mg/kg of the test item (Step - II). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality after the dosing.

No mortality was observed at 300 mg/kg dose group, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - I). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing.

As no mortality were observed at 24 hours after the dosing, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - II). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing. Gross pathological examination did not reveal any abnormalities in animals from 300 mg/kg and 2000 mg/kg dose groups.

Under the condition of the study, the acute oral LD50 value of 1the given test chemical was considered to be >2000 mg/kg body weight. Thus, it was concluded that the acute toxicity study of the given test chemical, when administered via oral route in Sprague Dawley rats falls into the “Category Not classified” criteria of CLP.

 

Both the above studies are further supported with the study mentioned in report for the test chemical. The reported study was designed and conducted to determine the acute oral toxicity profile of the given test chemical as per OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method) in Sprague Dawley rats.

Initially, three female animals were treated at the dose level of 300 mg/kg body weight of the test item (Step - I). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality at 24 hours after the dosing. As no mortality was observed at 24 hours after the dosing, three female animals were added to the study and treated with the same dose of 300 mg/kg of the test item (Step - II). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality after the dosing.

No mortality was observed at 300 mg/kg dose group, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - I). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing. As no mortality were observed at 24 hours after the dosing, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - II). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing. Gross pathological examination did not reveal any abnormalities in animals from 300 mg/kg and 2000 mg/kg dose groups.

Under the condition of the study, the acute oral LD50 value of 1the given test chemical was considered to be >2000 mg/kg body weight. Thus, it was concluded that the acute toxicity study of the given test chemical, when administered via oral route in Sprague Dawley rats falls into the “Category Not classified” criteria of CLP.

 

Thus, based on the above summarised studies on test chemical, it can be concluded that LD50 value is >2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute oral toxicity.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Quality of whole database:

Data is Klimisch 2 and from authoritative database.

Acute toxicity: via inhalation route

Link to relevant study records

Reference

Endpoint:

acute toxicity: inhalation

Data waiving:

other justification

Justification for data waiving:

other:

Endpoint conclusion

Quality of whole database:

Waiver

Acute toxicity: via dermal route

Link to relevant study records

Reference

Endpoint:

acute toxicity: dermal

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Remarks:

experimental data from various test chemicals

Justification for type of information:

Data is summarized based on the available information from various test chemicals.

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Reason / purpose for cross-reference:

read-across source

Qualifier:

according to guideline

Guideline:

other: As mentioned below

Principles of method if other than guideline:

WoE report is based on 3 acute dermal toxicity studies as- WoE 2, WoE 3 and WoE 4.
Acute dermal toxicity test was carried out to study the effects of the test chemicals on rodents.

GLP compliance:

not specified

Test type:

other: not specified

Limit test:

no

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

1. TEST ANIMALS
- Source: National Institute of Biosciences, Pune.
- Age at study initiation: Young adult male and female rats aged between 6 – 9 weeks were used.
- Weight at study initiation: The weight ranges of approximately 219.6 to 262.5 grams at initiation of dosing were used.
Body weights at the start : Male Mean: 257.02 g (= 100 %); Minimum: 251.5 g (- 2.15 %); Maximum: 262.5 g (+ 2.13 %)
Female Mean: 225.00 g (= 100 %); Minimum: 219.6 g (- 2.40 %); Maximum: 232.7 g (+ 3.42 %)
- Housing: The rats were individually housed in polycarbonate cages with paddy husk as bedding.
- Diet (e.g. ad libitum): Rodent feed supplied by the Nutrivet Life Sciences, Pune, was provided ad libitum from individual feeders.
- Water (e.g. ad libitum): Water was provided ad libitum from individual bottles attached to the cages. All water was from a local source and passed through the reverse osmosis membrane before use.
- Acclimation period: 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): Room temperature was maintained at 20.0 to 21.9 degree centigrade.
- Humidity (%): Room humidity was maintained at 56.1% to 58.7%.
- Air changes (per hr): The animal room was independently provided with at least ten to fifteen air changes per hour of 100% fresh air that had been passed through the HEPA filters.
- Photoperiod (hrs dark / hrs light): An artificial light and dark cycle of 12 hours each was provided to the room.
2. TEST ANIMALS
- Source: National Institute of Biosciences, Pune.
- Age at study initiation: Young adult male and female rats aged between 6 – 9 weeks were used.
- Weight at study initiation: The weight ranges of approximately 219.2 to 261.9 grams at initiation of dosing were used.
Body weights at the start : Male Mean: 256.60 g (= 100 %); Minimum : 248.3 g (- 3.23 %); Maximum : 261.9 g (+ 2.07 %)
Female Mean: 224.88 g (= 100 %); Minimum : 219.2 g (- 2.53 %); Maximum : 228.3 g (+ 1.52 %)
- Housing: The rats were individually housed in polycarbonate cages with paddy husk as bedding.
- Diet (e.g. ad libitum): Rodent feed supplied by the Nutrivet Life Sciences, Pune, was provided ad libitum from individual feeders.
- Water (e.g. ad libitum): Water was provided ad libitum from individual bottles attached to the cages. All water was from a local source and passed through the reverse osmosis membrane before use.
- Acclimation period: 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): Room temperature was maintained at 20.0 to 21.9 degree centigrade.
- Humidity (%): Room humidity was maintained at 56.1% to 58.7%.
- Air changes (per hr): The animal room was independently provided with at least ten to fifteen air changes per hour of 100% fresh air that had been passed through the HEPA filters.
- Photoperiod (hrs dark / hrs light): An artificial light and dark cycle of 12 hours each was provided to the room.
3. TEST ANIMALS
- Source: National Institute of Biosciences, Pune.
- Age at study initiation: Young adult male and female rats aged between 6 – 9 weeks were used.
- Weight at study initiation: The weight ranges of approximately 211.4 to 246.3 grams at initiation of dosing were used.
Body weights at the start : Male Mean: 240.62 g (= 100 %); Minimum: 236.8 g (- 1.59 %); Maximum: 246.3 g (+ 2.36 %)
Female Mean: 216.02 g (= 100 %); Minimum: 211.4 g (- 2.14 %); Maximum: 220.6 g (+ 2.12 %)
- Housing: The rats were individually housed in polycarbonate cages with paddy husk as bedding.
- Diet (e.g. ad libitum): Rodent feed supplied by the Nutrivet Life Sciences, Pune, was provided ad libitum from individual feeders.
- Water (e.g. ad libitum): Water was provided ad libitum from individual bottles attached to the cages. All water was from a local source and passed through the reverse osmosis membrane before use.
- Acclimation period: 5 days.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): Room temperature was maintained at 20.1 to 21.9 degree centigrade.
- Humidity (%): Room humidity was maintained at 55.5% to 59.2%.
- Air changes (per hr): The animal room was independently provided with at least ten to fifteen air changes per hour of 100% fresh air that had been passed through the HEPA filters.
- Photoperiod (hrs dark / hrs light): An artificial light and dark cycle of 12 hours each was provided to the room.

Type of coverage:

occlusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

1. TEST SITE
- Area of exposure: Dorsal surface and sides from scapular to pelvic area.
- % coverage: Approximately 10% of the total body surface area.
- Type of wrap if used: Porous gauze dressing and non-irritating tape.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Distilled water was used to remove residual test item.

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg bw
2. TEST SITE
- Area of exposure: Dorsal surface and sides from scapular to pelvic area.
- % coverage: Approximately 10% of the total body surface area.
- Type of wrap if used: Porous gauze dressing and non-irritating tape.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Distilled water was used to remove residual test item.

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg bw
3. TEST SITE
- Area of exposure: Dorsal surface and sides from scapular to pelvic area.
- % coverage: Approximately 10% of the total body surface area.
- Type of wrap if used: Porous gauze dressing and non-irritating tape.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Distilled water was used to remove residual test item.

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg bw

Duration of exposure:

1. 24 hours
2. 24 hours
3. 24 hours

Doses:

1. A single dose of 2000 mg of the test item per kilogram of body weight was administered to ten rats (five males and five females).
2. A single dose of 2000 mg of the test item per kilogram of body weight was administered to ten rats (five males and five females).
3. A single dose of 2000 mg of the test item per kilogram of body weight was administered to ten rats (five males and five females).

No. of animals per sex per dose:

1. 10 (5/sex).
2. 10 (5/sex).
3. 10 (5/sex).

Control animals:

not specified

Details on study design:

1. - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Twice daily
- Necropsy of survivors performed: Yes
- Other examinations performed: Clinical Observations and General Appearance: Animals were observed for clinical signs, mortality, until sacrifice.
Onset, duration and severity of any sign were recorded. The clinical signs and mortality observations were conducted at 10, 30, 60 minutes, 2, 4 and 6 hours on the day of dosing and once daily thereafter for 14 day. Daily observation was done as far as possible at the same time.
The observations were included general clinical signs, observations of eyes, mucous membranes, respiratory, circulatory system and behavior pattern.
Evaluation of Dermal Reaction: Dermal reaction was observed daily for study period of 14 days.

Body weights: Individual animal body weights were recorded pre-test (prior to administration of the test item), day 7 and at termination on day 14.

Gross Pathology: Necropsy was performed on animals surviving at the end of the study. Macroscopic examination of all the orifices, cavities and tissues were made and the findings were recorded. All animals surviving the study period were sacrificed by the carbon dioxide asphyxiation technique (day 15).
2. - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Twice daily
- Necropsy of survivors performed: Yes
- Other examinations performed: Clinical Observations and General Appearance: Animals were observed for clinical signs, mortality, until sacrifice.
Onset, duration and severity of any sign were recorded. The clinical signs and mortality observations were conducted at 10, 30, 60 minutes, 2, 4 and 6 hours on the day of dosing and once daily thereafter for 14 day. Daily observation was done as far as possible at the same time. The observations were included general clinical signs, observations of eyes, mucous membranes, respiratory, circulatory system and behavior pattern.

Evaluation of Dermal Reaction: Dermal reaction was observed daily for study period of 14 days.

Body weights: Individual animal body weights were recorded pre-test (prior to administration of the test item), day 7 and at termination on day 14.

Gross Pathology: Necropsy was performed on animals surviving at the end of the study. Macroscopic examination of all the orifices, cavities and tissues were made and the findings were recorded. All animals surviving the study period were sacrificed by the carbon dioxide asphyxiation technique (day 15).
3. - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Twice daily
- Necropsy of survivors performed: Yes
- Other examinations performed: Clinical Observations and General Appearance: Animals were observed for clinical signs, mortality, until sacrifice.
Onset, duration and severity of any sign were recorded. The clinical signs and mortality observations were conducted at 10, 30, 60 minutes, 2, 4 and 6 hours on the day of dosing and once daily thereafter for 14 day. Daily observation was done as far as possible at the same time.

The observations were included general clinical signs, observations of eyes, mucous membranes, respiratory, circulatory system and behavior pattern.

Evaluation of Dermal Reaction: Dermal reaction was observed daily for study period of 14 days.

Body weights: Individual animal body weights were recorded pre-test (prior to administration of the test item), day 7 and at termination on day 14.

Gross Pathology: Necropsy was performed on animals surviving at the end of the study. Macroscopic examination of all the orifices, cavities and tissues were made and the findings were recorded. All animals surviving the study period were sacrificed by the carbon dioxide asphyxiation technique (day 15).

Statistics:

1. not specified
2. not specified
3. not specified

Preliminary study:

1. not specified
2. not specified
3. not specified

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: No mortality was observed

Mortality:

1. Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg: All animals survived through the study period of 14 days.
Sex : Female Group I – Animal treated at the dose level of 2000 mg/kg: All animals survived through the study period of 14 days
2. Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg: All animals survived through the study period of 14 days.
Sex : Female Group I – Animal treated at the dose level of 2000 mg/kg: All animals survived through the study period of 14 days
3. Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg: All animals survived through the study period of 14 days.
Sex : Female Group I – Animal treated at the dose level of 2000 mg/kg: All animals survived through the study period of 14 days.

Clinical signs:

other: 1. Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any signs of toxicity during the study period of 14 days. Sex : Female Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result

Gross pathology:

1. Gross pathological examination did not reveal any abnormalities in animals from 2000 mg/kg dose group.
2. Gross pathological examination did not reveal any abnormalities in animals from 2000 mg/kg dose group.
3. Gross pathological examination did not reveal any abnormalities in animals from 2000 mg/kg dose group.

Other findings:

1. - Other observations: Evaluation of Dermal Reaction
Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.
Sex : Female Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.
2. - Other observations: Evaluation of Dermal Reaction
Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.
Sex : Female Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.
3. - Other observations: Evaluation of Dermal Reaction
Sex : Male Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.
Sex : Female Group I - Animal treated at the dose level of 2000 mg/kg body weight did not result in any skin reaction during the study period of 14 days.

Interpretation of results:

other: Not classified

Conclusions:

According to CLP regulation, the test chemical cannot be classified for acute dermal toxicity, as the LD50 value is >2000 mg/kg bw.

Executive summary:

In different studies, the given test chemical has been investigated for acute dermal toxicity to a greater or lesser extent. Often are the studies based on in-vivo experiments in rodents, i.e. most commonly in rats for test chemical. The studies are summarized as below –

 

The acute dermal toxicity study was conducted for the given test chemical as per OECD Guideline 402 (Acute Dermal Toxicity) in Sprague Dawley rats.

The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days.

Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.

Hence, the LD50 value was considered to be >2000 mg/kg bw, when male and female Sprague Dawley rats were occlusively treated with the given test chemical by dermal application following 14 days of observation period according to OECD Guideline 402 (Acute Dermal Toxicity).

 

The above study is supported with another study conducted on rats for the test chemical. The acute dermal toxicity study was conducted in Sprague Dawley rats according to OECD Guideline 402 (Acute Dermal Toxicity) for the test chemical.

The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days.

Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.

Hence, the LD50 value was considered to be >2000 mg/kg bw,when male and female Sprague Dawley rats were occlusively treated with the given test chemical by dermal application following 14 days of observation period according to OECD Guideline 402 (Acute Dermal Toxicity).

 

Both the above studies are further supported with the study mentioned in report. The reported study was designed and conducted to determine the acute dermal toxicity profile of the given test chemical as per OECD Guideline 402 (Acute Dermal Toxicity) in Sprague Dawley rats.

The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days. Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.

Hence, it was concluded that the acute dermal median lethal dose (LD50) of the given test chemical, when administered to male and female Sprague Dawley rats was considered to be >2000 mg/kg body weight. Thus by considering the CLP criteria for acute toxicity rating for the chemicals, it infers that the test chemical does not exhibits acute toxicity by the dermal route.

 

Thus, based on the above summarised studies on test chemical, it can be concluded that LD50 value is >2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute dermal toxicity.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Quality of whole database:

Data is Klimisch 2 and from report.

Additional information

Acute oral toxicity:

In different studies, the given test chemical has been investigated for acute oral toxicity to a greater or lesser extent. Often are the studies based on in-vivo experiments in rodents, i.e. most commonly in rats for test chemical. The studies are summarized as below –

 

Acute oral toxicity study of the given test chemical was conducted in 40 Crj: CD (SD) IGS, SPF male and female rat at the concentration of 0, 500, 1000 and 2000 mg/kg bw. The test substance (Purity - >99 %) was suspended in a medium containing 0.1% Tween 80 added 0.5% CMC-Na aqueous solution as 20 mL/kg.

Mortality and general condition were observed over 4 days, 30 minutes, 1, 3 and 6 hours after administration, once a day for 14 days, thereafter. Body weight was measured using an epple dish balance on days 4, 8 and 15 immediately before administration. Animals were observed for clinical signs.

No death occurred in both males and females. Clinical signs observed such as, red feces exhibiting the same color tone as the test substance were found between 6 hours and 3 days after administration in males and females of the test substance - administered group, and in all the sexes on the 2nd day. In addition, the coloration of the coat considered to originate from this red flavor was observed in males and females of the test substance-administered group between the 2nd and 4th days. But no abnormality considered to be a toxicity change was observed. No abnormality was found in body weight of animals. Diaphragmatic hernia in the thoracic cavity was found in one female in the 1000 mg/kg group. In the hernia, the caudate portion of the liver protruded nodularly into the thoracic cavity, a part of which was adhered to the chest wall. Since this change was expressed only in one case and not related to the dose, it was judged as a contingent finding. No other abnormality was found.

Therefore, the acute oral LD50 value was considered to be >2000 mg/kg bw, when Male and female SD rats were treated with the given test chemical via oral route.

The above study is supported with another study mentioned in study report to determine the acute oral toxicity profile of the given test chemical as per OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method) in Sprague Dawley rats.

Initially, three female animals were treated at the dose level of 300 mg/kg body weight of the test item (Step - I). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality at 24 hours after the dosing. As no mortality was observed at 24 hours after the dosing, three female animals were added to the study and treated with the same dose of 300 mg/kg of the test item (Step - II). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality after the dosing.

No mortality was observed at 300 mg/kg dose group, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - I). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing.

As no mortality were observed at 24 hours after the dosing, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - II). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing. Gross pathological examination did not reveal any abnormalities in animals from 300 mg/kg and 2000 mg/kg dose groups.

Under the condition of the study, the acute oral LD50 value of 1the given test chemical was considered to be >2000 mg/kg body weight. Thus, it was concluded that the acute toxicity study of the given test chemical, when administered via oral route in Sprague Dawley rats falls into the “Category Not classified” criteria of CLP.

 

Both the above studies are further supported with the study mentioned in report for the test chemical. The reported study was designed and conducted to determine the acute oral toxicity profile of the given test chemical as per OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method) in Sprague Dawley rats.

Initially, three female animals were treated at the dose level of 300 mg/kg body weight of the test item (Step - I). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality at 24 hours after the dosing. As no mortality was observed at 24 hours after the dosing, three female animals were added to the study and treated with the same dose of 300 mg/kg of the test item (Step - II). Administration of the test item at 300 mg/kg did not result in any signs of toxicity and mortality after the dosing.

No mortality was observed at 300 mg/kg dose group, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - I). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing. As no mortality were observed at 24 hours after the dosing, hence additional three female animals were treated with the higher dose of 2000 mg/kg of the test item (Step - II). Administration of the test item at 2000 mg/kg did not result in any signs of toxicity and mortality after the dosing. Gross pathological examination did not reveal any abnormalities in animals from 300 mg/kg and 2000 mg/kg dose groups.

Under the condition of the study, the acute oral LD50 value of 1the given test chemical was considered to be >2000 mg/kg body weight. Thus, it was concluded that the acute toxicity study of the given test chemical, when administered via oral route in Sprague Dawley rats falls into the “Category Not classified” criteria of CLP.

 

Thus, based on the above summarised studies on test chemical, it can be concluded that LD50 value is >2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute oral toxicity.

 

Acute Inhalation Toxicity:

The acute inhalation toxicity study need not be conducted because exposure to humans via inhalation route is not likely taking into account due to the low vapour pressure of the test chemical, which is reported to be 1.93E-021 Pa. Thus, exposure to inhalable dust, mist and vapour of the chemical is highly unlikely. Therefore this study is considered for waiver. 

 

Acute Dermal Toxicity:

In different studies, the given test chemical has been investigated for acute dermal toxicity to a greater or lesser extent. Often are the studies based on in-vivo experiments in rodents, i.e. most commonly in rats for test chemical. The studies are summarized as below –

 

The acute dermal toxicity study was conducted for the given test chemical as per OECD Guideline 402 (Acute Dermal Toxicity) in Sprague Dawley rats.

The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days.

Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.

Hence, the LD50 value was considered to be >2000 mg/kg bw, when male and female Sprague Dawley rats were occlusively treated with the given test chemical by dermal application following 14 days of observation period according to OECD Guideline 402 (Acute Dermal Toxicity).

 

The above study is supported with another study conducted on rats for the test chemical. The acute dermal toxicity study was conducted in Sprague Dawley rats according to OECD Guideline 402 (Acute Dermal Toxicity) for the test chemical.

The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days.

Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.

Hence, the LD50 value was considered to be >2000 mg/kg bw,when male and female Sprague Dawley rats were occlusively treated with the given test chemical by dermal application following 14 days of observation period according to OECD Guideline 402 (Acute Dermal Toxicity).

 

Both the above studies are further supported with the study mentioned in report. The reported study was designed and conducted to determine the acute dermal toxicity profile of the given test chemical as per OECD Guideline 402 (Acute Dermal Toxicity) in Sprague Dawley rats.

The test item was applied to shorn skin of 5 male and 5 female animals at 2000 mg/kg body weight. Administration of the test item at 2000 mg/kg did not result in any skin reaction at the site of application during the study period of 14 days. Administration of the test item did not result in any signs of toxicity and mortality during the study period of 14 days. Animals exhibited normal body weight gain through the study period of 14 days. Gross pathological examination did not reveal any abnormalities attributable to the treatment.

Hence, it was concluded that the acute dermal median lethal dose (LD50) of the given test chemical, when administered to male and female Sprague Dawley rats was considered to be >2000 mg/kg body weight. Thus by considering the CLP criteria for acute toxicity rating for the chemicals, it infers that the test chemical does not exhibits acute toxicity by the dermal route.

 

Thus, based on the above summarised studies on test chemical, it can be concluded that LD50 value is >2000 mg/kg bw. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute dermal toxicity.

 

Justification for classification or non-classification

Based on the above studies on test chemical, it can be concluded that LD50 value is >2000 mg/kg bw, for acute oral and acute dermal toxicity. Thus, comparing this value with the criteria of CLP regulation, the given test chemical cannot be classified for acute oral and acute dermal toxicity. For acute inhalation toxicity wavier was added so, not possible to classify.