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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Description of key information

A GPMT (Guinea Pig Maximisation Test) is available. Twenty male albino guinea pigs were used to test the sensitizing potential of 1,4-dihydroxyanthraquinone.

Key value for chemical safety assessment

Skin sensitisation

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not sensitising)
Additional information:

Only two of the 20 guinea pigs tested reacted when given the challenge injection. The mean score for each of the two guinea pigs indicates a severe response.


Respiratory sensitisation

Endpoint conclusion
Endpoint conclusion:
no study available
Additional information:

In a guinea pig maximization test on 20 animals only 2 animals showed a positive reaction.

Justification for classification or non-classification

In a guinea pig maximization test on 20 animals only 2 animals showed a positive reaction.

According to CLP classification criteria (Regulation (EC) No 1272/2008) a classification is therefore not justified.