[2-[[4-[(2-chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl](2-hydroxypropyl)dimethylammonium acetate

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-03-23 to 2017-05-08

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Version / remarks:

adopted on 24 February 1987

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1200 (Acute Dermal Toxicity)

Deviations:

no

Test guideline 4

Qualifier:

according to guideline

Guideline:

other: EPA, OPPTS Methods 870.1000 “Acute Toxicity Testing - Background

Deviations:

no

GLP compliance:

yes

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

[2-[[4-[(2-chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl](2-hydroxypropyl)dimethylammonium chloride

EC Number:

259-033-6

EC Name:

[2-[[4-[(2-chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl](2-hydroxypropyl)dimethylammonium chloride

Cas Number:

54229-13-9

Molecular formula:

C21H29ClN5O3.Cl

IUPAC Name:

[2-[[4-[(2-chloro-4-nitrophenyl)azo]phenyl]ethylamino]ethyl](2- hydroxypropyl)dimethylammonium chloride

Test material form:

solid: particulate/powder

Details on test material:

see below

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
Species and strain: Rat, Hsd: Sprague Dawley SD
Sex: Males and females (nulliparous and non-pregnant)
Age: 6 to 8 weeks old
Weight ordered: 176 to 200 grams
Supplier: Envigo RMS s.r.l., San Pietro al Natisone (UD), Italy
Breeder: Envigo RMS B.V., Kreuzelweg 53, 5961 NM Horst, Netherlands
Date of arrival: 15March 2017
Weight range at arrival: 188 to 198 grams for males; 189 to 197 grams for females
Acclimatisation period: At least 5 days
Veterinary health check: During acclimatisation period

ENVIRONMENTAL CONDITIONS
Animals per cage: Up to 5 of one sex during acclimatisation; individually caged during the study
Housing: Clear polysulphone H-Temp solid bottomed cages (Tecniplast Gazzada S.a.r.l., Buguggiate, VA, Italy) measuring 59.5×38×20cm during
acclimatisation period and 42.5×26.6×18.5cm during the study with nesting material provided into suitable bedding bags.
Cage control: Daily inspected and changed as necessary (at least 3 times/week)
Water Drinking water supplied to each cage via a water bottle
Water supply: Ad libitum
Diet: 4 RF 18 (Mucedola S.r.l., Via G.Galilei, 4, 20019, Settimo Milanese (MI) Italy)
Diet supply: Ad libitum throughout the study
Room lighting: Artificial (fluorescent tubes), daily light/dark cycle of 12/12 hours
Air changes: Approximately 15 to 20 air changes per hour
Temperature range: 22 °C ± 2 °C
Relative humidity range: 55% ± 15%

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

water

Remarks:

to form a paste

Details on dermal exposure:

TEST SITE
- Area of exposure: Dorsal surfaces of the trunk
- % coverage: Approximately 10% of body surface
- Type of wrap if used: Elastic adhesive bandage and gauze patch

REMOVAL OF TEST SUBSTANCE
- Washing (if done): Yes, with cotton wool soaked with lukewarmwater
- Time after start of exposure: 24 hours

Duration of exposure:

The animals remained in contact with the test item for 24 hours

Doses:

2000 mg/kg body weight

No. of animals per sex per dose:

5 males and 5 females at 2000 mg/kg body weight

Control animals:

not required

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Animals were observed for clinical signs the day of dosing: on dosing, approximately 1 hour after dosing, 2 hours after dosing, approximately 4 hours after dosing. Daily thereafter for a total of 14 days. All animals were weighed at allocation to the study (Day -1), on the day of dosing (Day 1) and on Days 8 and 15.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight.

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

not determinable due to absence of adverse toxic effects

Mortality:

No mortality occurred.

Clinical signs:

Only red staining at the treated site, due to the colour of the test substance, was observed in all male and female animals from Day 2 up to the end of the observation period.

Body weight:

Body weights and body weight changes were within the expected range for this species and age of animals at the end of the study.

Gross pathology:

Red staining at the treatment site was observed in all animals during the external examination performed on all animals at termination of the study. No internal abnormalities were noted during the necropsy procedure.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Basic Red 18:1 Chloride did not cause any deaths or adverse effects at a single dose of 2000 mg/kg body weight, administered dermally to male and female rats for 24 hours.The dermal LD50 is hence greater than 2000 mg/kg body weight.

Executive summary:

The acute toxicity of Basic Red 18:1 Chloride was investigated following dermal administration of a single dose to the rat.

A single dose of 2000 mg/kg body weight was administered to a group of 5 male and 5 female animals for 24 hours. After 14 days, all animals were killed and subjected to necropsy examination.

No mortality occurred and only red staining at the treated site, due to the colour of the test substance, was observed in all male and female animals from Day 2 up to the end of the observation period. The body weight changes observed during the study were within the expected range for this species and age of animals.

Only red staining at the treatment site, due to the colour of the test substance, was found at necropsy in all animals at termination of the study.

These results indicate that the test item, Basic Red 18:1 Chloride, has no toxic effect on the rat following dermal exposure over a 24 hour period at a level of 2000 mg/kg body weight. The lack of mortality demonstrates the LD₅₀ to be greater than 2000 mg/kg body weight.