Registration Dossier

Environmental fate & pathways

Biodegradation in soil

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Half live in sediment determined from TGD default values for readily degradable substances and with calculated Kpsoil

Key value for chemical safety assessment

Half-life in soil:
30 000 d
at the temperature of:
12 °C

Additional information

Biodegradation in soil

The Kpsoil was set to the maximum values as the observed Kd of 5.2*104L/kg is outside of the adviced range and set to max value of 50000 L/kg. The suggested half-life for a readily degradable substance with a Kpsoil in the range >10000 - <=100000 l/kg is 30000 days.These values are considered as extremely conservative but in the absence of measured data will be used in the exposure assessment as a worst-case. The half-life of the bioavailable fraction of alkyl dipropylene triamines in the water phase of soils is expected to be in the order of a few days, which is based on experiments with dialkyldimethylammonium salts (van Ginkel et al, 2003).