Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Key value for chemical safety assessment

Skin sensitisation

Endpoint conclusion
Additional information:

There is no study available for pyrazole concerning skin sensitization.

However, read-across to 1,4 -dimethylpyrazole has been performed. In a GLP-compliant guideline study (according to OECD TG 406; BASF, 1995), 1,4 -dimethylpyrazole showed no skin sensitizing properties. Moreover, pyrazole does not show a sensitizing alert (protein binding) in QSAR modeling (OECD Toolbox v.1.0). Therefore, no sensitzing potential is expected.

Justification for classification or non-classification