Registration Dossier
Registration Dossier
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EC number: 244-491-1 | CAS number: 21643-42-5
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The biodegradability of the read across substance (mixture of CAS no. 2156-97-0 and 21643-42-5) was assessed according to OECD guideline 301B (1992) and EU-method C.4-C (2008). The degree of biodegradation of the test substance was 80-90 % CO2/ThCO2 after an exposure period of 28 days. The read across substance (mixture of CAS no. 2156-97-0 and 21643-42-5) is readily biodegradable under the conditions of this test.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
A biodegradability test of the read across substance (mixture of CAS no. 2156-97-0 and 21643-42-5) was performed which allows the biodegradability to be measured in an aerobic aqueous medium. The biodegradability was determined in the determination of the biodegradability in the CO2 -Evolution Test performed according to OECD guideline no. 301B.
The initial test concentration was 20 mg/L TOC, equivalent to approx. 26 mg/L test substance. The duration of the exposure was 28 days and the test system (inoculum) was activated sludge from the municipal sewage plant Mannheim, Germany.
The degree of biodegradation of the test substance was 80 -90 % CO2/ThCO2 after an exposure period of 28 days. That means that the test substance was readily biodegradable under the conditions of this test.
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