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EC number: 203-275-7 | CAS number: 105-16-8
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The test substance was (or its hydrolysis products were) considered to be ready biodegradable based on the results of a microbial degradation study according to OECD Guideline 301.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
A ready biodegradability study (microbial degradation) with the test substance was performed for 28 days according to OECD Guideline 301 C (Modified MITI test). The following measurements and analyses were made: Measurement of biochemical oxygen demand (BOD) with closed-system oxygen consumption measuring apparatus; Analysis of dissolved organic carbon by total organic carbon analysis (TOC); Analysis of dissolved organic carbon by total organic carbon analysis (TOC); Analysis of test substance with high-performance liquid chromatography (HPLC). Results of the three test vessels containing each 100 mg/L of test substance and 300 mg/L of activated sludge were compared to the vessels containing only test substance and water (for a theoretical value). The test substance was quickly hydrolyzed to form methacrylic acid and 2-diethylaminoethanol. The following results were obtained:
Degradability based on measurement of BOD (oxygen consumption): 89 %, 35 %, 86 %, average of 70 %; of TOC: 93 %, 40 %, 94 %; by HPLC: 100%, 100%, 100%. The BOD and the TOC results relate to the 2 hydrolyses products of the test substance.
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