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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Description of key information

Based on test results, Reactive Brown 49 is not readily or inherently biodegradable.

Additional information

The biodegradation of the substance was determined as 6% after 28 days of incubation. The test substance did not reach the pass level of 70% for ready biodegradability in the DOC Die-Away Test either within the 10-day window or after 28 days of incubation. Therefore, the substance cannot be assessed as readily biodegradable.

Under Inherent biodegradability test conditions, the total elimination (regarding adsorption and biodegradation) of the substance after 28 days was 4 %. The substance is not inherently biodegradable.

Also, the Biochemical Oxygen Demand experiment gave a BOD5value of 0 mg O2/g, and therefore the substance is not considered as biodegradable.