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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In the absence of substance specific information data from Nickel dihydroxide, Cobalt dihydroxide, Tricobalt tetraoxide, Trimanganese tetraoxide and Manganese dioxide are used for hazard assessment based on a worst-case mixture approach.


Nickel dihydroxide is classified as a dermal sensitizer (Skin Sens. 1, H317) and a respiratory sensitizer (Resp. Sens. 1, H334) under the 1st ATP to the CLP. 


Cobalt dihydroxide is self-classified as as a dermal sensitizer (Skin Sens. 1, H317) and a respiratory sensitizer (Resp. Sens. 1B, H334) under Regulation (EC) No. 1272/2008.


Tricobalt tetraoxide is self-classified as a respiratory sensitizer (Resp. Sens. 1B, H334) under Regulation (EC) No. 1272/2008.

Key value for chemical safety assessment

Justification for classification or non-classification

Based on the mixture approach, the registered substance is classified as a dermal sensitizer (Skin Sens. 1, H317) and a respiratory sensitizer (Resp. Sens. 1, H334) under Regulation (EC) No. 1272/2008.