Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Coco fatty acids 2 -sulfoethyl ester, sodium salt is readily biodegradable and is considered to be hydrolytically stable. Coco fatty acids 2-sulfoethyl ester, sodium salt has a low to moderate tendency to sorb to organic matter. For two sludges an average Koc value of 1451 L/kg was observed for Lauric acid 2 -sulfoethyl ester, sodium salt in an OECD 106 sorption/desorption study. Biodegradation is thus considered to be the main removal mechanism of this substance. The half-life in the different environmental compartments is expected to be short. No measured data is available which quantifies the half-life in soil or sediment. These values can therefore be estimated as a worst-case based on the readily biodegradability and the sorption data as determined in a sorption desorption test.

 

DT50(days)

Degradation in water:

15

Degradation in sea water

50

Degradation in sediment

30

Degradation in soil

30

Coco fatty acids 2-sulfoethyl ester, sodium salt has a low vapour pressure and Henry's law constant and because there are no important releases into the atmosphere degradation in air is thought to be of low relevance. For Coco fatty acids 2 -sulfoethyl ester, sodium salt no significant hydrolysis is predicted to occur according to the hydrowin module in EPIsuite. Degradation of Coco fatty acids 2 -sulfoethyl ester, sodium salt through hydrolysis is therefore not considered.

Direct photolysis of Coco fatty acids 2-sulfoethyl ester, sodium salt i

n air/water/soil will not occur, because it does not absorb UV radiation above 290 nm. Photo transformation in air/water/soil is therefore assumed to be negligible.

Coco fatty acids 2-sulfoethyl ester, sodium salt has a low tendency to partition to octanol and has a relatively high water solubility. The bioaccumulation potential of Coco fatty acids 2-sulfoethyl ester, sodium salt was therefore assessed based on the ratio of the octanol and water solubilities and resulted in log Kow values of -0.41 indicating a low bioaccumulation potential.