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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Biodegradation in water: screening tests

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Description of key information

The biodegradation of 2,4-dichloro aniline, being the hydrolysis product of 2,4-dichlorophenyl isocyanate, is 0 % after 28 days. The substance has to be considered as "Not readily biodegradable" (MITI-online, 1990).

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

Isocyanates are known to rapidly hydrolyse under the formation of the corresponding amine. Thus, it is not possible to obtain a stable concentration of 2,4-dichlorophenyl isocyanate over the whole test duration due to its rapid hydrolysis and observed effects would be rather caused by the transformation product (2,4-dichloro aniline) than by the original substance itself. Concluding, results obtained through the testing of 2,4-dichloro aniline can be used to assess the risk of 2,4-dichlorophenyl isocyanate towards aquatic organisms as well.