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Administrative data

Description of key information

Not irritating on rabbit skin (OECD 404)

Not irritating in rabbit eyes (OECD 405)

Key value for chemical safety assessment

Skin irritation / corrosion

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Eye irritation

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not irritating)

Respiratory irritation

Endpoint conclusion
Endpoint conclusion:
no study available

Additional information

Reliable data from several studies on skin irritation are available for four members of the 'yellow disazo condensation pigments' (CAS 5580-57-4, 5280-80-8, 68516-73-4, 79953-85-8). These data reveal a very low skin irritation potential for the 'yellow disazo condensation pigments'. In a primary dermal OECD guideline irritation study (OECD 404, Ciba-Geigy Ltd., 1983), 3 female New Zealand White rabbits were dermally exposed to 0.5 g of the test substance (CAS 5280-80-8) for 4 hours under semiocclusive conditions. Animals then were observed for 7 days. Irritation was scored by the method of Draize as described in the OECD guideline 404. The mean score for the 24, 48 and 72 h reading for erythema was 0.44 and for edema was 0. The skin reactions observed were fully reversible within 48 hours. Under the conditions of the present experiment the test substance (CAS 5280-80-8) was found to be non-irritant and not corrosive when applied to the rabbit skin. For three further test substances of the 'yellow dazo condensation pigments' (CAS 5580-57-4, 68516-73-4, 79953-85-8) similar results were found although the treatment was under more severe conditions: On the intact skin (flanks) of three rabbits 0.5 g of the substance, moistened with tap water or polyethylene glycol, was applied onto skin for 24h under occlusive conditions. Observations 24h, 48h, 72h, after treatment did not reveal formation of erythema or edema or only light erythema.
No reliable study on skin irritation of one 'yellow diazo condensation pigment' (CAS 5580-58-5) is available. But due to the consistent observation that the other 'yellow disazo condensation pigments' do not induce skin irritation it is concluded that this member is also not irritating to skin. In summary, it is concluded that 'yellow disazo condensation pigments' are not irritating to skin and have not to be classified as skin irritants.
Reliable data from two studies on eye irritation are available for the test substance.

An eye irritation test according to OECD guideline 405 with three New Zealand White rabbits is available for the test substance (Dominion, 2011). Eyes were left unwashed after application of one-tenth of a milliliter (0.03 g) of test substance and the animals were observed for 72 hours. The scores for the test substance were all 0 for conjunctivae redness, corneal opacity, iris, and conjunctivae chemosis.

In a supporting study similar to OECD guideline 405, the eyes of 6 rabbits were treated with 30 mg of the test substance and were observed for 7 days (Clariant, 1980). The mean scores for all animals were all 0 for cornea, iris, conjunctivae redness and conjunctivae chemosis.

Thus, the test substance is not considered to be irritating to the rabbit eyes.


Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No 1272/2008
The available experimental test data are reliable and suitable for classification purposes under Regulation (EC) No 1272/2008. Based on available data on skin irritation/corrosion and eye irritation, the test item is not classified according to Regulation (EC) No 1272/2008 (CLP), as amended for the tenth time in Regulation (EU) No 2017/776.