Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Acid Red 195 is considered to be not readily biodegradable.

Additional information

By the nature of their design and use, acid 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.

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.

Additionally, Acid Red 195 (FAT 20042/D, FAT 20042/B and FAT 20042/A) when tested for BOD5 and COD had BOD5/COD ratio <0.5 in all cases, hence it is considered to be not readily biodegradable.