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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

LAS-TEA is readily biodegradable. No studies on degradation of LAS-TEA in water-sediment or in soil are available. In accordance with column 2 of REACH Annex IX, the water and sediment simulation test and biodegradation test in soil do not need to be conducted.

Supporting studies are also available for read-across substances, such as LAS-Na, which are also readily biodegradable. 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. For the soil compartment this is relevant for indirect applications via sludge application.


TEA is shown to biodegrade rapidly in both water-sediment and in soil, with maximum half-life times of 1.7 and 1.8 days, respectively. Further maximum mineralisation half-life was determined in water-sediment and in soil of 7.2 and 5.4 days, respectively. In the Guidance on the application of CLP criteria, a substance can be identified as rapidly biodegradable if the measured rate constant in the different environmental compartments is > 0.043 d-1(Guidance on the application of CLP criteria, Guidance to regulation (EC) No 1272/2008 on classification, labelling and packaging (CLP) of substances and mixtures, ANNEX II, 2.3). The measured rate constant for biodegradation and mineralization are all > 0.043 d-1. Therefore, according to CLP criteria, TEA is rapidly biodegradable.


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 mineralisation. The rate constant for mineralization was 0.06 day-1. Half-life in sludge-amended soil after application of sludge of LAS-Na was >7 -<22 days based on recovered LAS-Na.