Registration Dossier
Registration Dossier
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EC number: 295-714-4 | CAS number: 92128-22-8
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The ready biodegradability of the substance was tested in two closed bottle tests according to EU method C.4-E at two different test concentrations. 33 % degradation was observed at test concentration of 2.4 mg/L and 42 % degradation was observed at test concentration of 33.6 mg/L. Based on the results, the substance can be concluded as "Not readily biodegradable".
The inherent biodegradation of the substance was tested in a modified MITI Test (II). Within 28 days 97 % of the test substance was observed to be degradated; and hence it is considered to be inherently biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- inherently biodegradable
Additional information
Respiration inhibition on activated sludge is suspected in the closed bottle test from Bayer Industry Services (2006), because the test concentration (33.6 mg/L) was 3 times higher than the water solubility (10.3 mg/L) of the test item (Bayer Industry Services, 2007) and a 3h-EC10 of the test substance (18 mg/L) on activated sludge was observed (Currenta, 2009b). Therefore, a new closed bottle test with lower test concentration (2.4 mg/L) was carried out by Currenta in 2009 and used as key study.
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