Registration Dossier
Registration Dossier
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EC number: 276-770-9 | CAS number: 72705-24-9
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The inherent biodegradability of the test substance was examined in a study (BASF SE, 932/a-02, 2003). The degree of biodegradation after an exposure period of 28 days was 1 %. Based on the available study according to OECD 302B, the test substance is evaluated to be not inherently (readily) biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The inherent biodegradability of the test substance was examined in a study (BASF SE, 932/a-02, 2003). No bioelimination of the test substance occurred within 28 days based on a study according to OECD 302B. The degree of biodegradation after an exposure period of 28 days was 1 %. No elimination of the test substance due to absorption to the activated sludge, on the glass surface or other physico-chemical processes was found as determined by means of DOC measurements 3 h after start of the test. Also no biodegradation of the test substance based on CO2 evolution and calculated as % ThCO2 was observed. Thus, the test substance is not considered as inherently biodegradable, since the criteria for fulfilling the regulatory important term "inherently biodegradable, fulfilling criteria" are not met (criteria: > 60% oxygen depletion in 7 days or > 70% TOC decrease in 7 days). Regarding the result of the key study on biodegradability, the substance is not inherently biodegradable according to OECD criteria. Therefore, the test substance cannot be considered as inherently (readily) biodegradable.
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