diethyl 1,4-cyclohexanedicarboxylate

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 23 August 1999 to 06 September 1999

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1999

Report date:

2009

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Version / remarks:

Adopted 24 February 1987

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

Principles of method if other than guideline:

not applicable

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

417-310-0

EC Name:

-

Cas Number:

72903-27-6

Molecular formula:

C12H20O4

IUPAC Name:

1,4-diethyl cyclohexane-1,4-dicarboxylate

Test material form:

liquid

Details on test material:

Sponsor's identification: ST 03 C 99
Description: colourless liquid
Date received: 30 June 1999
Storage conditions; under nitrogen at room temperature in the dark

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River (UK)
- Age at study initiation: 8-12 weeks old
- Weight at study initiation: males: 200-210 g , females: 200-222 g
- Fasting period before study: no
- Housing: suspende polypropylene cages furnished with woodflakes. Animals individually housed during exposure period (24h), then in group of 5, by sex.
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19-25
- Humidity (%): 30-70
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12/12

IN-LIFE DATES: From: 03 August (start of dosing) To: 18/19 August (necropsy)

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- % coverage: ca 10% of body surface
- Type of wrap if used: surgical gauze semi-occluded with a piece of self-adhesive bandage

REMOVAL OF TEST SUBSTANCE
- Washing (if done): with cotton wool moistened with distilled water
- Time after start of exposure: 24h

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 1.92 mL/kg
- Constant volume or concentration used: yes

Duration of exposure:

24 h

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

5 per sex per dose

Control animals:

not required

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing:
Observations: after 30 min, 1, 2, 4 hours after dosing, then daily for 14 days
Weighing: Days 0 (prior application), 7 and 14
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, pathological observation (external observation & opening of the abdominal and thoracic cavities to check macroscopic abnormalities).

Statistics:

Not applicable/Nor required

Results and discussion

Preliminary study:

not applicable

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

None

Clinical signs:

other: no signs of systemic toxicity

Gross pathology:

No abnormalities detected

Other findings:

No signs of dermal irritation (erythema or oedema) were observed from day 1 to day 14 in all the animals treated.

Any other information on results incl. tables

none

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Dermal LD50 Combined > 2000 mg/kg bw

Executive summary:

Introduction. A study was performed to assess the acute dermal toxicity of the test material in the Sprague-Dawley CD strain rat. The method used followed that described in the OECD Guidelines for Testing of Chemicals No. 402 "Acute Dermal Toxicity" (adopted 24 February 1987) and Method B3 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).

The results may be used as a basis for classification and labelling under Annex VI of Council Directive 67/548/EEC (as adapted to technical progress by Commission Directive 93/21/EEC) relating to the classification, packaging and labelling of dangerous substances.

 

Methods A group of ten animals (five males and five females) was given a single 24-hour, semi-occluded dermal application to intact skin at a dose level of 2000 mg/kg bodyweight. The animals were observed for fourteen days after the day of treatment and were then killed for gross pathological examination.

 

Results and Conclusion There were no deaths. No signs of systemic toxicity or skin irritation were noted.

Animals showed expected gain in bodyweight during the study.

No abnormalities were noted at necropsy.

The acute dermal median lethal dose (LD50) of the test material in the Sprague Dawley CD strain rat was found to be greater than 2000 mg/kg bodyweight. No symbol and risk phrase are required according to the Regulation (EC) No. 1272/2008 (CLP).