2,2'-vinylenebis[5-methylbenzoxazole]

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1973

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1973

Report date:

1987

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

2,2'-vinylenebis[5-methylbenzoxazole]

EC Number:

213-866-1

EC Name:

2,2'-vinylenebis[5-methylbenzoxazole]

Cas Number:

1041-00-5

Molecular formula:

C18H14N2O2

IUPAC Name:

2,2'-vinylenebis[5-methylbenzoxazole]

Test material form:

solid: particulate/powder

Details on test material:

Identity FAT 65004/F TE
Batch 15060201 (China)
Purity determined in this study
Appearance
Smell
yellowish powder, solid at 20°C
neutral
pH-Value pH-value of a soln. of 2% (w/w) = 6.90
Expiration date August 25th, 2020
Storage to be stored at room-temperature

Specific details on test material used for the study:

None

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

Animals:
Healthy New Zealand White rabbits (Porton strain) aged 3 -• 4 months with average body weights of 3.73 Kgs. (male) and 3.30 Kgs. (female), bred on. the premises and maintained under a semi-barrier system. Six rabbits (3 male and 3 female) were acclimatized in the test area for one week prior to the start of the trial.
Husbandry:
The rabbits were caged singly in an experimental room maintained at a temperature of 20°C. (±1°) and a relative humidity of 50-70 %. Animals were exposed to artificial light for 15 hours daily from 08.00 - 23.00 hours. A commercial irradiated diet (Styles-Oxoid) was fed ad lib. Sterile filtered water was available at all times.

Test system

Type of coverage:

occlusive

Preparation of test site:

abraded

Vehicle:

unchanged (no vehicle)

Controls:

no

Amount / concentration applied:

0.5 ml. of the compound was applied on a 2.5 cm. square sterile gauze pad to each test site

Duration of treatment / exposure:

24 hrs

Observation period:

72 hrs

Number of animals:

6 aminals (3 male and 3 female)

Details on study design:

The test was carried out according to the method given in the "Hazardous Substances Regulations" under the U.S. Federal Hazardous Substances Labelling Act Sect. 191.11 (February 1965).
Twenty-four hours prior to the dermal application, the backs of the rabbits were shaved over an area consisting of at least 10% of the total body surface. Two test sites lateral to the mid line of the back were used on each rabbit. Immediately before the application of the test compound, the right hand site was abraded with the point of a sterile hypodermic needle. The abrasions were sufficiently deep to penetrate the stratum corneum but not to damage the dermis. The left hand site remained intact.

0.5 ml. of the compound was applied on a 2.5 cm. square sterile gauze pad to each test site. These were covered with aluminium foil secured with "Sleek" adhesive tape. The test sites were then enclosed by a 6" wide "Coban" self adhesive bandage the edges of which were fixed to the skin by strips of "Sleek" in order to retain the test substance in close contact with the skin.

After 24 hours the dressing was removed and the intact and abraded application sites were assessed for oedema and erythema. A further assessment was made at 72 hours.
The assessment of the macroscopic skin reaction was made according to Draie grading system.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

mean

Time point:

24 h

Score:

0

Remarks on result:

no indication of irritation

Results 2

Irritation parameter:

erythema score

Basis:

mean

Time point:

72 h

Score:

0

Remarks on result:

no indication of irritation

Results 3

Irritation parameter:

edema score

Basis:

mean

Time point:

24 h

Score:

0

Remarks on result:

no indication of irritation

Results 4

Irritation parameter:

edema score

Basis:

mean

Time point:

72 h

Score:

0

Remarks on result:

no indication of irritation

Irritant / corrosive response data:

No skin reaction occurred

Other effects:

none

Any other information on results incl. tables

none

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Compound FAT 65 004 is not a primary skin irritant in the albino rabbit.

Executive summary:

The test was carried out according to the method given in the"Hazardous Substances Regulations" under the U.S. Federal HazardousSubstances Labelling Act Sect. 191.11 (February 1965).

Healthy NewZealand White rabbits (Porton strain) aged 3 -4months with average body weights of 3.73 Kgs. (male) and 3.30 Kgs.(female),bred on. the premises and maintained under a semi-barriersystem. Six rabbits(3 maleand 3female) were acclimatized in the testarea for oneweek prior to the start of the trial.

 

Twenty-four hours prior to the dermal application, the backs ofthe rabbits were shaved over an area consisting of at least10%ofthe total body surface. Two test sites lateral to the mid line ofthe back were used on each rabbit. Immediately before theapplication of the test compound, the right hand site was abradedwiththe point of a sterile hypodermic needle. The abrasions weresufficiently deep to penetrate the stratum corneum but not to damagethe dermis. The left hand site remained intact.

 

0.5 ml. of the compound was applied on a 2.5 cm. squaresterile gauze pad to each test site.These were covered with aluminium foil secured with "Sleek" adhesivetape. The test sites were then enclosed by a 6" wide "Coban" selfadhesive bandage the edges of which were fixed to the skin by stripsof "Sleek" in order to retain the test substance in close contactwith the skin.

 

After 24 hours the dressing was removed and the intact andabraded application sites were assessed for oedema and erythema.A further assessment was made at 72 hours.

The assessment of the macroscopic skin reaction was madeaccording toDraiegrading system.

Compound FAT 65 004 is not a primary skin irritant in the albino rabbit.