Registration Dossier

Categories

Categories

Category name:
Anthraquinone dyes

Justifications and discussions

Category definition:
LANXESS Deutschland GmbH has registered five mono-constituent anthraquinone dyes of similar chemical structure using a category approach: Solvent Violet 36 (CAS No 82-16-6), Solvent Green 3 (CAS No 128-80-3), Reinblau RLW (CAS No 41611-76-1), Reinblau BLW (CAS No 32724-62-2) and Solvent Green 28 (CAS No 4851-50-7). Additional data were taken from another registered anthraquinone dye, Solvent Blue 104 (CAS No 116-75-6), leading to a category consisting of six members.
Category rationale:
The category consists of substances all having the diamino-anthraquinone structure as a common moiety which is linked to phenyl groups via the amino groups. Differences within the category are described by various alkyl groups bound to the phenyl groups. The main properties of all members are the chemical and biochemical stability, the extremely low water solubilities and the high water-octanol partition coefficients. These properties lead to a reduced bioavailability for organisms. Therefore the substances do no exert any toxic effects and thus they are not classified.