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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The biodegradation of trisodium EDDS was assessed in an activated sludge simulation test (DOC removal) conducted according to OECD Guideline 303 A and in compliance with GLP. The mean DOC removal value, based on 17 measurements taken between days 8-30 (with one result excluded) was 95.6% (SD 3.3%). Therefore, trisodium EDDS was shown to be readily biodegradable (Geukens, 1993b; Schowanek et al. 1997). 

Key value for chemical safety assessment

Additional information

The biodegradation of trisodium EDDS was assessed in an activated sludge simulation test (DOC removal) conducted according to OECD Guideline 303 A and in compliance with GLP. The mean DOC removal value, based on 17 measurements taken between days 8-30 (with one result excluded) was 95.6% (SD 3.3%). Therefore, trisodium EDDS was shown to be readily biodegradable (Geukens, 1993b; Schowanek et al. 1997).

[Data on trisodium EDDS is considered relevant to use for understanding the potential biodegradability of EDDS acid, and is acceptable for using as read-across information].