2,6-diisopropylaniline

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

July 1983

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: study performed in accordance with the corresponding OECD-/EU-testing guidelines

Cross-reference

Cross-reference 1

Reason / purpose for cross-reference:

reference to same study

Cross-reference 2

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1983

Report date:

1983

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

P 5175

IUPAC Name:

P 5175

Constituent 2

Reference substance name:

2,6-diisopropylaniline

EC Number:

246-305-4

EC Name:

2,6-diisopropylaniline

Cas Number:

24544-04-5

Molecular formula:

C12H19N

IUPAC Name:

2,6-bis(propan-2-yl)aniline

Details on test material:

- Name of test material (as cited in study report): P5175
- Appearance and physical state: dark brown liquid
- Stability under test conditions: stable
- Storage condition of test material: at room temperature in the dark

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Bantin and Kingman ltd., The Field Station, Grimston, Aldbrough, Hull, HUll 4QE
- Weight at study initiation: 2.56-2.92 kg
- Housing: individual housing
- Diet (e.g. ad libitum): SQC Rat and Mouse Maintenance Diet No.1, Expanded, Special Diets Services Ltd., Stepfield, Witham, Essex
- Water (e.g. ad libitum): Tap water, free of contaminants
- Acclimation period: 3 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17-24°C, single air-conditioned room
- Humidity (%): 39-63%
- Photoperiod: Fluorescent lighting, automatically controlled to give a cycle of 14 hours light (06.00 to 20.00 hr) and 10 hours darkness

Test system

Type of coverage:

semiocclusive

Preparation of test site:

shaved

Vehicle:

water

Controls:

no

Amount / concentration applied:

0.5 g test item moistened with water

Duration of treatment / exposure:

4 hours

Observation period:

1, 24, 48 and 72 hours after removal of the patches

Number of animals:

3 female rabbits

Details on study design:

The back of each animal was clipped free of hair the day prior to treatment using electric veterinary clipper (Model A2, Oster, Milwaukee, Wisconsin).
A portion of test article (0.5 g moistened with water) was applied to an area of skin approximately 6 cm2 on each animal and covered with a gauze patch. The patch was occluded and secured using a strip of impermeable adhesive tape (Sleek, Smith & Nephew, Welwyn Garden City, Herts.). A plastic collar was placed around the neck of each animal to prevent premature removal of the wrappings and ingestion of the test article. Four hours after application the patches were removed and the skin wiped with a disposable paper towel moistened with water to remove any test article still remaining.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

mean

Time point:

other: 1, 24, 48 and 72 hours

Score:

0

Max. score:

0

Results 2

Irritation parameter:

edema score

Basis:

mean

Time point:

other: 1, 24, 48 and 72 hours

Score:

0

Max. score:

0

Irritant / corrosive response data:

No irritation was noted in any animal during the 72 hour observation period. A primary irritation index of 0 was obtained. The test item was regarded as non-irritant to rabbit skin. No corrosive effects were noted.

Other effects:

None.

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The substance was classified as non-irritant to skin.

Executive summary:

The test was performed in 1983 as GLP-study according to OECD 404. Three albino rabbits were treated semi-occlusive with 0.5 g test item applied on a 6 cm2 patch. Observation times were 24, 48 and 72 hours after removal of the patch. Neither erythema nor oedema were observed in all animals. A primary irritation index of 0 was obtained.

Therefore, the test item is not irritating to rabbit skin.