Nonylbenzoate, branched and linear

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27. Feb. 2003 - 13. Mar. 2003

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2003

Report date:

2003

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes

Test type:

other: limit test

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Benzoic acid isononylester

Cas Number:

670241-72-2

IUPAC Name:

Benzoic acid isononylester

Test material form:

liquid

Details on test material:

Sponsor's identification : BENZOIC ACID ISONONYLESTER
Description : colourless liquid
Batch number : 1276/00576
Date received : 06 January 2003
Storage conditions : 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) Ltd, Margate. Kent, UK
- Age at study initiation: eight to twelve weeks
- Weight at study initiation: at least 200g
- Housing: suspended solid-floor polypropylene cages furnished with woodflakes
- Diet (e.g. ad libitum): Certified Rat and Mouse Diet (Code 5LF2) supplied by International Product Supplies Limited, Wellingborough, Northants, UK
- Water (e.g. ad libitum): yes
- Acclimation period: at least 5 days


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

Administration / exposure

Type of coverage:

semiocclusive

Details on dermal exposure:

The appropriate amount of test material was applied as evenly as possible to an area of shorn skin (approximately 10% of the total body surface areal using a graduated syringe. A piece of surgical gauze was placed over the treatment area and semi-occluded with a piece of self-adhesive
bandage. The animals were caged individually for the 24-hour exposure period. Shortly after dosing the dressings were examined to ensure that they were securely in place. After the 24-hour eontaet period the bandage was earefully removed and the treated skin and surrounding hair wiped with cotton wool moistened with distilled water to remove any residual test material. The animals were returned to group housing for the remainder of the study period.

Duration of exposure:

24 h

Doses:

2000 mg/kg

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: The animals were observed for deaths or overt signs of toxicity Y2, 1, 2 and 4 hours after dosing
and subsequently onee daily for fourteen days.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight,organ weights, histopathology, other:

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Mortality:

There were no deaths.

Clinical signs:

other: There were no signs of systemic toxicity.

Gross pathology:

No abnormalities were noted at necropsy.

Applicant's summary and conclusion

Interpretation of results:

practically nontoxic

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

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. The test material does not meet the criteria for classification and will not require labelling for dermal toxicity in accordance with EU labelling regulations Commission Directive 2001/59/EC
far classification and labelling of dangerous substances and preparations.

Executive summary:

The study was performed to assess the acute dermal toxicity of the test material in the Sprague-Dawley CD strain rat according to OECD 402 "Acute Dermal Toxicity" (adopted 24 February 1987) and Commission Directive 92/69/EEC Method B3 Acute Toxicity (Dermal).

A group of ten animals (five males and five females) was given a single, 24-hour, semi-occluded dermal application of undiluted test material to intact skin at a dose level of 2000 mg/kg bodyweight. Clinical signs and bodyweight development were monitored during the study. All animals were subjected to gross necropsy.

Mortality: There were no deaths.

Clinical Observations: There were no signs of systemic toxicity.

Dermal Irritation: There were no signs of dermal irritation.

Bodyweight: All animals showed expected gains in bodyweight over the study period.

Necropsy: No abnorrnalities were noted at necropsy.

Conclusion: 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.