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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Description of key information

Half life period of 4-aminobenzene-1,3-disulphonic acid in water is observed to be 15 days (360 hrs ) while in sediment it is 140 days (3360 hrs).Based on these half life values of 4-aminobenzene-1,3-disulphonic acid, it is concluded that the chemical is readily biodegradable in water whereas it is non biodegradable in sediment. However, since there is only 0 percent diffusion of the substance in the sediment medium and hence persistence in the sediment compartment is not likely to be critical.

Key value for chemical safety assessment

Half-life in freshwater:
15 d
at the temperature of:
25 °C
Half-life in freshwater sediment:
140 d
at the temperature of:
25 °C

Additional information

Based on the Level III Fugacity Model, the half life period of the 4-aminobenzene-1,3-disulphonic acid was estimated. The half period of 4-aminobenzene-1,3-disulphonic acid in water is 15 days (360 hrs) therfore it is considered that the substance will qualify as not persistent as the half life does not exceed the EPA criteria of 60 days. So, it can be confirmed that the substance is readily biodegradable in water medium where as in sediment the half life is 140 days (3360 hrs).

Based on this value, it can be inferred that the substance is persistent in sediment medium and is not readily biodegradable probably due to the anaerobic conditions existing in most sediments.


Half-Life (days)

Percent in