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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Description of key information

At 25 °C, Reactive Brown 49 is stable at pH 4 with half-life period is greater than one year; while at pH 7 has a half-life period of 64.3 h (about 2.7 days) and is unstable at pH 9 with half-life period shorter than one day.


The Reactive brown 49 is not readily or inherently biodegradable.


Reactive Brown 49 can be regarded as little mobile in all three soils in adsorption and desorption test.

Additional information