Registration Dossier
Registration Dossier
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EC number: 263-179-6 | CAS number: 61791-46-6
Endpoint summary
Administrative data
Description of key information
Biodegradation in water: screening tests:
The test item is readily biodegradable under the conditions of the closed bottle test according to the OECD guideline 301 D.
Additional information
Biodegradation in water: screening tests:
The ready biodegradability of the test item was determined using the closed bottle test (OECD guideline No. 301 D, 1992).
During the study, the determination of oxygen concentrations were performed at the start of the experiment (day 0) and after 7, 10, 14, 21 and 28 days. The test item reached a maximum biodegradability of 63.68% based on ThOD of the main component within 28 days of biodegradation exceeding 60%. All differences of duplicate biodegradation values expressed as mg O2/L were less than 20% (-1.18%). After 28 days oxygen depletion in the inoculum blank obtained was 0.98 mg O2/L which is below 1.5 mg O2/L. The residual concentrations of oxygen in the test bottles were found to be > 0.5 mg/L at all durations. The reference substance (sodium acetate) attained a 65.62% biodegradation level (greater than 60% degradation) within 14 days based on ThOD. The percentage degradation of the toxicity control has attained a maximum of 67.24% (greater than 25% degradation) by 14 days. Therefore the test item was concluded to be non- inhibitory to the microbial inoculum. The total nitrogen (N) was determined at all the pre-determined intervals and there was no significant increase in Oxidized Nitrogen from the start to end of the experiment. Since all criteria for acceptability of the test were met, this study was considered to be valid.
Based on these results the test item is readily biodegradable under the conditions of the closed bottle test according to the OECD guideline 301 D.
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