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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

In accordance with column 2 of REACH Annex IX, the water and sediment simulation test does not need to be conducted as the substance is readily biodegradable.

Key value for chemical safety assessment

Additional information

The biodegradation of LAS-IPA may be further described by the biodegradation of LAS-Na and IPA according to the read-across statement in which full dissociation of the LAS-IPA in water is supported. LAS-IPA, LAS-Na and IPA are all readily biodegradable, so water and sediment simulation tests are not required.

However, available information is given below:

For IPA no relevant data are available.

Biodegradation of LAS-Na in sediment is rapid.Mineralization (14CO2 production) was best described by a First Order Model (r2 > 0.99), indicating that parent and metabolites were equally bioavailable to undergo mineralization. The rate constant for mineralization was 0.06 day-1.