Registration Dossier
Registration Dossier
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EC number: 278-154-5 | CAS number: 75268-65-4
Endpoint summary
Administrative data
Description of key information
FAT 40138 is not readily biodegradable.
Additional information
By the nature of their design and use, textile dyes are not intended to be readily biodegradable as this would assist in the rapid destruction of the dyestuff, rendering it unfit for purpose. There are ISO, European, American (AATCC) and national standards for the colour fastness of dyes. Dyes are required to have specific fastness properties. If the dyes were biodegradable, it would not be possible for them to have these fastness properties. 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.
In the studies to evaluate inherent biodegradation of FAT 40138, the maximum bioelimination reported was 7.1 % elimination after 28 days. Further, multiple studies evaluating BOD5 and COD are available. The relevant BOD5/COD quotient is <0.5 in all cases, indicating substance to be not rapidly degradable.
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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