Registration Dossier
Registration Dossier
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EC number: 275-738-1 | CAS number: 71631-15-7 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77504.
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Transformation/dissolution of the pigment under the described test criteria is below 0.7%.
Key value for chemical safety assessment
Additional information
Transformation/dissolution of nickel iron chromite black 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 pH 6, 1 mg loading:
dissolved Ni: 1.86 µg/L
dissolved Fe: below LoD
dissolved Cr: 0.58 µg/L
dissolved Mn: 1.18 µg/L
Full test 28 days at pH 6, 1 mg loading:
dissolved Ni: 3.50 µg/L
dissolved Fe: below LoD
dissolved Cr: 0.76 µg/L
dissolved Mn: 2.29 µg/L
As dissolved Ni, Fe, Cr and Mn concentrations were below 4 µg/L respectively at the highest loading of 1 mg/L, referring to a solubility of < 0.7 %, the pigment can be considered environmentally inert.
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