Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

LAS-IPA is readily biodegradable. No studies on degradation of LAS-IPA 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.

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. For the soil compartment this is relevant for indirect applications via sludge application.

LAS-Na and IPA are also readily biodegradable.

For IPA no other relevant data are available.

LAS-Na

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.

Half-life in sludge-amended soil after application of sludge of LAS-Na was >7 -<22 days based on recovered LAS-Na.