Registration Dossier
Registration Dossier
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EC number: 207-662-1 | CAS number: 487-68-3
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The substance is not readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The biodegradation of the test substance was determined in a study according to the protocol "Biodegradation Study of Chemicals" as described in "About Test Methods for New Chemical Substances" (Kanpogyo Notification No. 5, Yakuhatsu Notification No. 615, and 49 Kikyoku Notification No. 392). In this study non-adapted activated sludge was inoculated with 100 mg/L test substance for 28 days. The mean degradation rate was 0% regardless of whether it was determined based on BOD or TOC. The degradation rate determined by HPLC was 13% on the average when it was determined based on the residual amount of the test substance and 0% on the average when it was determined based on the residual amount of the (test substance + intermediate (2,4,6-trimethyl benzoic acid)) or the residual amount of the intermediate (2,4,6-trimethyl benzoic acid), indicating that the test substance was partly oxidized and transformed to 2,4,6-trimethyl benzoic acid, but was not decomposed. Based on these findings, the test substance was considered to be resistant to degradation.
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