Registration Dossier
Registration Dossier
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Reaction mass of 5,5'-{(phenylmethanediyl)bis[benzene-4,1-diyl-diazene-2,1-diyl]}bis{1-[3-(dimethylamino)propyl]-4-methyl-6-oxo-3-(pyridinium-1-yl)-1,6-dihydropyridin-2-olate} hydrochloride and 5,5’-[3,4’-(phenylmethanediyl)diphenylene]bis(diazene-2,1-diyl)bis{1-[3-(dimethylamino)propyl]-4-methyl-6-oxo-3-(pyridinium-1-yl)-1,6-dihydropyridin-2-olate} hydrochloride
EC number: 700-312-3 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
Applicability of read across approach
For the assessment of the stability and biodegradability of the substance registered, a read across approach to an analogue substance was being applied. The applicability of the read across approach had been confirmed by the registrant via an expert statement (see IUCLID chapter 13).
Abiotic and biotic degradation
Based on the available data it is to be concluded that the analogue substance is hydrolytically stable in the environmentally relevant pH and temperature range.In the two studies on ready and inherent biodegradability, the analogue substance was not biodegradable under the test conditions within 28 days.
The analogue substance therefore is to be considered as persistent. Furthermore the substance does not fulfil CLP criteria for being "rapidly degradable", what has implications to chronic aquatic toxicity classification.
Based on the applicability of the proposed read across approach, the same degradation properties are likely to apply to the substance registered as well.
Transport and distribution
As a cationic azo paper dye the substance registered is highly adsorptive to cellulose fibres. Furthermore, with reference to the actually observed highly efficient removal in a mechanical-biological wastewater treatment process, the high level of adsorption to activated sludge of cationic azo paper dyes in general, and of the substance registered in particular, also is evidenced. Conduct of a laboratory-based adsorption/desorption study is considered not necessary and therefore is being waived. For the substance registered an indicative log Koc value of 6.0 shall be used for risk assessment, i.e. the substance registered is to be considered as highly adsorptive to sludge and soil.
Bioaccumulation
For substances within the tonnage band 10 - 100 tpa the conduct of a bioaccumulation study is not needed. Based on the low log Pow < -1.4 it further can be concluded that bioaccumulative behaviour can be considered as very unlikely for the substance registered.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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