Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Not readily biodegradable according to OECD criteria.

Additional information

The described 'yellow disazo condensation pigment' is practically insoluble and therefore considered to be essentially not bioavailable. Due to the large molecular size, cellular uptake of the pigment is unlikely. Hence intracellular biodegradation, which is the main degradation route of bacteria, is probably low. It can be concluded that the substance is likely to be persistent in the environment. This confirms an inherent biodegradation test (CAS 5280-80-8) according to OECD guideline 302C, in which only 12% degradation were observed after 28 days. Additionally, two model calculations showed that the pigment is not readily biodegradable. Therefore, biodegradation simulation tests in water, sediment or soil are not proposed, since no relevant new findings are expected from such investigations.

Furthermore, a QSAR calulation has been conducted (2017) supporting the findings of the OECD guideline study and showing that all relevant metabolites are not readily as well. Futhermore, alls metabolites are regarded a not bioaccumulative according PBT criteria. It is assumed that the results of further simulation studies would not reveal any different findings. Therefore, further simulation studies in water/sediment and soil are not provided.