Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Water solubility

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The solubility of the pigment is <0.8% (w/w) at 1 mg loading and pH 6 after 28 days. After 7 days at a higher loading of 100 mg the solubility of the pigment is <0.05% (w/w) at pH 6.

Key value for chemical safety assessment

Additional information

The water solubility of zinc iron chromite brown spinel was measured according to the method OECD test series No. 29 (Guidance document on transformation/dissolution of metals and metal compounds in aqueous media). The transformation/dissolution of the pigment resulted in the following dissolved concentrations:

Full test 7 days at 1 mg/L and pH 6: < 0.9 µg/L Cr, < 0.8 µg/L Ni, < LoD Fe and < 2.9 µg/L Zn

Full test 28 days at 1 mg/L and pH 6: <1.2 µg/L Cr, < 1.1 µg/L Ni, < 0.23 µg/L Fe and < 4.5 µg/L Zn

Full test 7 days at100 mg/L and pH 6: 0.87 ± 0.14 μg/L Cr, <LOD/LOQ Fe, 5.58 ± 0.48 μg/L Ni, 37.1 ± 3.65 μg/L Zn

Full test 7 days at 100 mg/L loading and pH 8: 0.51 ± 0.02 μg/L Cr, <LOD Fe, 1.51 ± 0.23 μg/L Ni, 0.68 μg/L Zn

As dissolved Cr, Ni, Fe and Zn concentrations were below 4.5 µg/L respectively, at a loading of 1 mg/L, referring to a total solubility of < 0.8 %, the pigment can be considered environmentally inert. At loadings of 100 mg at pH values 6 and 8 after 7 days, the highest dissolution was observed at pH 6 with a total dissolution of <45 µg/L (Cr, Ni, Fe and Zn).