Registration Dossier
Registration Dossier
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EC number: 281-866-9 | CAS number: 84045-65-8
Endpoint summary
Administrative data
Description of key information
The test substance FAT 40147 is considered to be not-biodegradable and hydrolytically stable.
Additional information
In general, textile chemicals especially textile dyes are designed to be no organic substrates for microorganisms, fungi and higher organisms. Therefore these substances are considered to be not biodegradable. Nevertheless, basic studies to assess biodegradability of FAT 40147 have been performed.
In the studies to evaluate inherent biodegradation of FAT 40147, the maximum bioelimination reported was 37 % elimination over 31 days. Further, multiple studies evaluating BOD5 and COD are available. The relevant BOD5/COD quotient is <0.5 in all cases, indicating the substance to be not rapidly biodegradable.
Taking into consideration the data from key study and supporting studies, the test substance FAT 40147
is considered to be not biodegradable.
Additionally, by the nature of their design and use, dyes are not intended to be readily biodegradable as this would assist in the rapid destruction of the dyestuff, rendering it unfit for purpose. As such, it is accepted that such substances are not readily biodegradable under relevant environmental conditions. A published study (Pagga & Brown, 1986) describes the results of the testing of 87 dyestuffs in short-term aerobic biodegradation tests. The authors of this publication concluded that dyestuffs are very unlikely to show any significant biodegradation in such tests and that 'there seems little point in carrying out such test procedures’ on dyestuffs.
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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