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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

No reliable data is available on acute toxicity of selenous acid.

Justification for classification or non-classification

Since no reliable data is available on repeated dose toxicity of selenous acid it is proposed to adopt the harmonised classification as laid down in Regulation (EC) No. 1272/2008 and subsequent regulations. Selenous acid (as part of the group entry "selenium compounds except cadmium sulphoselenide") is classified for STOT RE 2:" May cause damage to organs through prolonged or repeated exposure" (H373).