Registration Dossier
Registration Dossier
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EC number: 269-053-7 | CAS number: 68186-91-4 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77428.
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 0.5%.
Key value for chemical safety assessment
Additional information
Transformation/dissolution of copper 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 ofthe pigmentresulted in the following dissolved concentrations:
28d-full test at 1 mg/L, and
pH 6: 3.4 ± 0.3 µg Cu/L, >0.5 <1 µg Cr/L
pH 8: 1.9 ± 0.3 µg Cu/L, >0.5 <1 µg Cr/L
As dissolved Cu and Cr concentrations were below 5 µg/L at the highest loading of 1 mg/L, referring to a solubility of < 0.5 %, the pigment can be considered environmentally inert.
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