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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Key value for chemical safety assessment

Additional information

Naphtol AS D did not increase the number of revertant colonies in all tested strains of bacteria.


Short description of key information:
An Ames test with and without metabolic activation (rat liver S9mix) was performed in several Strains of Salmonella typhimurium ( TA 98, 100, 1535, 1537, 1538) and Escherichia coli (WP2uvrA)

Endpoint Conclusion: No adverse effect observed (negative)

Justification for classification or non-classification

No mutagenic effects were detected in vitro in bacteria.