Registration Dossier
Registration Dossier
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EC number: 251-178-3 | CAS number: 32724-62-2
Endpoint summary
Administrative data
Description of key information
Adsorption endpoint was covered by read-across with experimental study of the source substance, Reinblau RLW (1,4-bis[(2-ethyl-6-methylphenyl)amino]anthraquinone; CAS n°41611-76-1), another member of the category. This read-across experimental value was supported by QSAR values from the registered substance itself.
Adsorption:
An adsorption coefficient (log Koc) of 6.2 was determined on Reinblau RLW (CAS n°41611-76-1), at pH 6, which refers to 25 °C. Based on read-accross approach, the result indicates that Reinblau BLW (Cas N° 32724-62-2) is immobile in soils (McCall et al., 1981).
McCall P.J., Laskowski D.A., Swann R.L., and Dishburger H.J., (1981), “Measurement of sorption coefficients of organic chemicals and their use, in environmental fate analysis”, in Test Protocols for Environmental Fate and Movement of Toxicants. Proceedings of AOAC Symposium, AOAC,Washington DC.
Henry's Law constant: Data is neither required nor available.
Additional information
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 28 (CAS No 4851-50-7), Reinblau RLW (CAS No 41611-76-1), Reinblau BLW (CAS No 32724-62-2) and Solvent Green 3 (CAS No 128-80-3). Additional data were taken from another registered anthraquinone dye, Solvent Blue 104 (CAS 116 -75 -6), leading to a category consisting of six members (see attached justification in IUCLID chapter 13). 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. All substances included in the category approach are poorly water soluble with high adsorption coefficient (log Koc>6), high partition coefficient (logKow>8) and not readily biodegradable.
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