3-hydroxy-1,1-dimethylbutyl 2-ethyl-2-methylheptaneperoxoate

Endpoint summary

Description of key information

The LD0 in rats exposed to 3-hydroxy-1,1-dimethylbutylperoxy-neodecanoate are more than 2000 mg/kg after oral or dermal exposure.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

yes

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMAL
- Source: Iffa Credo (69210 L'Arbresle, France)
- Age: 6 weeks
- Weight at study initiation: 174 ± 9 g (males) and 150 ± 3 g (females)
- Upon their arrival at the laboratory, the animals were acclimatized to the experimental environment for at least 5 days during which they were observed daily.
- Animals were individually identified by earmarks or earnotches
- Diet: ad libitum
- Food: ad libitum

ENVIRONMENTAL CONDITIONS
- Temperature : 22 ± 3°C
- Humidity : 50 ± 20% relative humidity
- Light/dark cycle: 12 hours of light/12 hours of dark
- The air was non-recycled and filtered by absolute filters.
- The animals were housed in groups of 4 to 7 animals of the same sex during the acclimatization period and groups of 5 animals of the same sex during the study.
- The day before treatment, the animals were fasted for a period of approximately 18 hours before administration of the test substance. They were then given food 4 hours after treatment.

Route of administration:

oral: gavage

Vehicle:

other: none

Details on oral exposure:

- Volume administered: taking into consideration the specific gravity of the test substance (0.96)
- Post dose observation period: 14 days

Doses:

2000 mg/kg

No. of animals per sex per dose:

5 males + 5 females

Control animals:

no

Details on study design:

- Clinical signs: examined at least once a day
- Mortality: recorded at least twice a day
- Body weight: measured just before administration then on days 5, 8 and 15.
- Necropsy: . macroscopic examination of the main organs: digestive tract, heart, kidneys, liver, lungs, pancreas, spleen and any other organs with obvious abnormalities.
- Microscopic examination: no

Statistics:

none

Sex:

male/female

Dose descriptor:

LD0

Effect level:

>= 2 000 mg/kg bw

Mortality:

No deaths occurred during the observation period.

Clinical signs:

other: No clinical signs were observed during the study.

Other findings:

NECROPSY FINDINGS: No apparent abnormalities.
Due to the absence of macroscopic lesions, no organ samples were taken and no histological examination was performed.

Interpretation of results:

study cannot be used for classification

Remarks:

Migrated information

Conclusions:

Under the experimental conditions, the LD0 of the test substance administered by oral route in rats was higher than 2000 mg/kg. No signs of toxicity were observed at this dose level.

Executive summary:

The test substance was administered by oral route to a group of 10 fasted Sprague-Dawley rats (5 males and 5 females) in an acute toxicity test by oral route (OECD 401, GLP).

The test substance was administered in its original form at a dose level of 2000 mg/kg at a volume taking into consideration that the specific gravity of the test substance was .96.

The mortality, general behaviour and body weight gain of the animals were observed for a period of 14 days after the single administration of the test substance. A necropsy was performed on each animal sacrificed at the end of the study.

The general behaviour and body weight gain of the animals were not influenced by the treatment. No deaths occurred at the dose level of 2000 mg/kg. The macroscopic examination revealed no abnormalities in the animals sacrificed at the end of the study.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

discriminating dose

Value:

2 000 mg/kg bw

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Link to relevant study records

Reference

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1991

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

yes

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMAL
- Source: Iffa Credo (69210 L'Arbresle, France)
- Age: 8 weeks
- Weight at study initiation: 271 ± 7 g (males) and 230 ± 4 g (females)
- Upon their arrival at C.I.T., the animals were acclimatized to the experimental environment for at least 5 days during which they were observed daily.
On the first day of treatment, the adult animals were approximately 8 weeks old, and had a mean weight of 271 ± 7 g for the males and 230 ± 4 g for the females.
- They were individually identified by earmarks or earnotches.

ENVIRONMENTAL CONDITIONS
- Temperature : 22 ± 3°C
- Humidity : 50 ± 20% relative humidity
- Light/dark cycle: 12 hours of light/12 hours of dark
- The air was non-recycled and filtered by absolute filters.
- Food and water: ad libidum

Type of coverage:

semiocclusive

Vehicle:

other: none

Details on dermal exposure:

- Area covered: approximately 10%
- Exposure: semi-occlusive
- Concentration in vehicle: undiluted
- Total volume applied: according to the body weight determined on the day of treatment and test substance specific gravity (0.96)
- Removal of test substance: no
- Exposure duration: 24 hours
- Post-dose observation period: 14 days
- The day before treatment, the dorsal area of each animal was clipped with an electric clipper on an area of 6 x 8 cm. Only animals with healthy intact skin were used for the study.
- A hydrophilic gauze patch was applied to the skin
- The test substance and the gauze patch were held in contact with the skin for 24 hours by means of an adhesive hypoallergic aerated semi-occlusive dressing attached to a restraining bandage. This dressing prevented the ingestion of the test substance by the animal. No residual test substance was observed at removal of the dressing.

Duration of exposure:

24 hours

Doses:

2000 mg/kg

No. of animals per sex per dose:

- Number of animals: 5 males + 5 females

Control animals:

no

Details on study design:

- Clinical signs: examined at least once a day
- Mortality: recorded at least twice a day
- Body weight: measured just before administration then on days 5, 8 and 15.
- Necropsy: . macroscopic examination of the main organs: digestive tract, heart, kidneys, liver, lungs, pancreas, spleen and any other organs with obvious abnormalities.
- Microscopic examination: no, due to the absence of macroscopic lesions

Statistics:

NONE

Sex:

male/female

Dose descriptor:

LD0

Effect level:

>= 2 000 mg/kg bw

Mortality:

No deaths occurred during the observation period.

Clinical signs:

other: No clinical signs were observed during the study.

Other findings:

NECROPSY FINDINGS: No apparent abnormalities.

Interpretation of results:

study cannot be used for classification

Remarks:

Migrated information

Conclusions:

The LD0 of the test substance administered by dermal route in rats was higher than 2000 mg/kg. No signs of toxicity were observed at this dose level.

Executive summary:

In an acute toxicity test by dermal route (OECD 402, GLP), the test substance was applied in its original form directly to the skin of 10 Sprague-Dawley rats (5 males and 5 females) at a dose level of 2000 mg/kg, taking into consideration that the specific gravity (SG) of the test substance was 0.96. After 24 hours under a semi-occlusive dressing, no residual test substance was observed.

The mortality, general behaviour and body weight gain of the animals were observed for a period of 14 days after the single application of the test substance. A necropsy was performed on each animal sacrificed at the end of the study.

The general behaviour and body weight gain of the animals were not influenced by the treatment. No deaths occurred at the dose level of 2000 mg/kg.

The macroscopic examination revealed no abnormalities in the animals sacrificed at the end of the study.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

discriminating dose

Value:

2 000 mg/kg bw

Additional information

Two well-conducted studies (OECD guideline 402 and 406, GLP) are available for this endpoint. In the first one (Clouzeau, 1992a), the test substance was administered by oral route to a group of 10 fasted Sprague-Dawley rats (5 males and 5 females). In the second study (Clouzeau, 1992b), the test substance was applied in its original form directly to the skin of 10 Sprague-Dawley rats (5 males and 5 females) at a dose level of 2000 mg/kg. In both studies, after 14 days, a necropsy was performed on each animal sacrificed. The general behaviour and body weight gain of the animals were not influenced by the treatment. No deaths occurred at the dose level of 2000 mg/kg. The macroscopic examinations revealed no abnormalities in the animals sacrificed at the end of the study.In conclusion, the LD0 in rats exposed to 3-hydroxy-1,1-dimethylbutylperoxy-neodecanoate are more than 2000 mg/kg after oral or dermal exposure.

Justification for selection of acute toxicity – oral endpoint
Key study

Justification for selection of acute toxicity – dermal endpoint
Key study

Justification for classification or non-classification

According to EU Regulation (EC) N0. 1272/2008 (CLP), the substance is not classified for acute toxicity.