Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

not readily biodegradable (max. 7.2% after 45 d) (OECD 301B)

Key value for chemical safety assessment

Biodegradation in water:
under test conditions no biodegradation observed

Additional information

The ready biodegradability of glufosinate-ammonium was investigated experimentally (Voelskow, 1995; M-166505-02-2) in activated sludge at two test concentrations of 0.1 or 1 mg a. s. /L, following application of 3,4-14C-labelled active substance and incubation at 22 °C under the conditions of a carbon dioxide evolution test (Sturm test) for a maximum of 28 days. The study was conducted according to GLP and OCED guideline 301B.

The evaluation revealed that glufosinate-ammonium can be regarded as not readily biodegradable under the conditions of the test, with maximum biodegradation rates of 7.22% and 1.19% CO2evolution at rates of 0.1 and 1.0 mg test item/L, respectively.