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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.

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Additional information

The biodegradation of LAS-TEA may be further described by the biodegradation of LAS-Na and TEA according to the read-across statement in which full dissociation of the LAS-TEA in water is supported.

TEA is shown to biodegrade rapidly in both water-sediment with max. half-life times of 1.7 days. Further maximum mineralization half-life was determined in water-sediment of 7.2 days.

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.