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Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Study period:
2008/06/03-2008/06/13
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: This study was conduced following an accepted OECD guideline and in compliance with the Good Laboratory Practice.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
2007/15/02

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Batch n°: T73615
- Form: pearls
- Colour: beige
- Storage: room temperature

Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals and environmental conditions:
Animals
- Rabbits: New Zealand male albino
- Supplier: elevage de Gérome (Quartier Labaste- F40260 Linxe)
- Acclimatisation period: 5 days
- Weight of animals: between 2.38 and 2.68kg (during the test)
- Age at the beginning of the test: 11 to 12 weeks old

Housing
Each animal was kept in an individual box installed in conventionnal air conditioned animal husbanding; the environmental conditions were:
- T°: between 19 and 23°C
- Relative humidity: between 39 and 52%
- Lighting time: 12 hours daily
- Rate of air exchange: at least ten changes per hour

Drinking water and foodstuff were supplied freely.
Microbiological and chemical analyses of the water were carried out once every six months by the Institut Européen de l'Environnement de Bordeaux.

Test system

Type of coverage:
semiocclusive
Preparation of test site:
shaved
Vehicle:
unchanged (no vehicle)
Controls:
other: On the opposite flank, an untreated area was served as control.
Amount / concentration applied:
0.5g of the test item was applied on an undamaged skin area of one flank of one animal
Duration of treatment / exposure:
4 hours
Observation period:
If no reaction is observed 72 hours after the treatment, the study was terminated. In case of persistent reactions, additional observations can be carried out from D4 to D14 in order to determine the reversible character of the lesions observed.
Number of animals:
Initially, a single animal was treated. After consideration of the cutaneous responses produced in the first treated animal, two additional animals were treated during 4 hours.
Details on study design:
Approximatively 24 hours before the test, the rabbits' backs anf flancks were shorn using electric clippers equipped with a fine comb, so as to expose an area of skin about 6 cm².

0.5g of the test item was applied on an undamaged skin area of one flank of one animal. The patch was secured in position with a strip of surgical adhesive tape. After the removal of the patch, the treated area was rinsed with distilled water.
On the opposite flank, an untreated area was served as control.
Initially, a single animal was treated. After consideration of the cutaneous responses produced in the first treated animal, two additional animals were treated during 4 hours.

The skin reactions were appreciated 1 hour and then 24, 48 and 72 hours after removal of the patch.
This examination consists in assessing the irritant reactions in the treated zone, compared to a control area; the following scales are used:
Grading scales :
Erythema and Eschar formation Oedema
0...... No erythema 0 ......No oedema
1...... Very slight erythema (barely perceptible) 1 ......Very slight oedema (barely perceptible)
2......Well defined erythema 2 ...... Slight oedema (contour clearly defined)
3...... Moderate to severe erythema 3 ......Moderate oedema (raised approx. 1mm)
4...... Severe erythema (beef redness) with eschars formation 4 ...... Severe oedema (raised more than 1mm, preventing grading of erythema and extending beyond area of exposure)

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Remarks:
mean value
Basis:
animal #1
Time point:
other: 24-72h
Score:
ca. 0.3
Reversibility:
fully reversible
Irritation parameter:
erythema score
Remarks:
mean value
Basis:
animal #2
Time point:
other: 24-72h
Score:
ca. 0
Irritation parameter:
erythema score
Remarks:
mean value
Basis:
animal #3
Time point:
other: 24-72h
Score:
ca. 0.3
Reversibility:
fully reversible
Irritation parameter:
edema score
Basis:
animal #1
Time point:
other: 24-72h
Score:
ca. 0
Irritation parameter:
edema score
Basis:
animal #2
Time point:
other: 24-72h
Score:
ca. 0
Irritation parameter:
edema score
Basis:
animal #3
Time point:
other: 24-72h
Score:
ca. 0
Irritant / corrosive response data:
According to the calculated means, the item must not be classified in accordance with the European regulation 67/548/EEC.
Other effects:
It was noted, 1 hour after the test item application, on the treated area, a slight to well defined erythema in the three animals associated with a very slight oedema in one animal. The oedematous reaction was totally reversible at D1 and the erythematous reactions were totally reversible between D1 and D2.

Applicant's summary and conclusion

Interpretation of results:
not irritating
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
The test item is non irritant to skin (Psi=0.3) according to the classification established in the journal officiel de la republique francaise dated February 21st, 1982.
According to the criteria for classification, packaging and labelling of dangerous substances and preparations in accordance with the E.E.C. Directives 67/548, 2001/59 and 99/45 and regulation 1272/2008, the test substance needs not be classified. No symbol and risk phrase are required.
Executive summary:

The test item was applied, as supplied, at the dose of 0.5 g, under semi occlusive dressing during 4 hours on an undamaged skin area of 3 rabbits. The experimental protocol was established from the OECD guideline n°404 dated April 24th, 2002 and the test method B.4 of the directive n°2004/73/EC

It was noted, 1 hour after the test item application, on the treated area, a slight to well defined erythema in the three animals associated with a very slight oedema in one animal. The oedematous reaction was totally reversible at D1 and the erythematous reactions were totally reversible between D1 and D2.

The test item is non irritant to skin (Psi=0.3) according to the classification established in the journal officiel de la republique francaise dated February 21st, 1982.

According to the criteria for classification, packaging and labelling of dangerous substances and preparations in accordance with the E.E.C. Directives 67/548, 2001/59 and 99/45 and regulation 1272/2008, the test substance needs not be classified. No symbol and risk phrase are required.