Registration Dossier
Registration Dossier
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EC number: 804-773-2 | CAS number: 427165-44-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The ready biodegradability of the test item was determined with non-adapted activated sludge in the Manometric Respirometry Test for a period of 28 days. The study was conducted according to OECD guideline 301 F and regulation 440/2008/EC C.4-D at Dr.U.Noack-Laboratorien, 31157 Sarstedt, Germany.
The oxygen was depleted by the respiration of bacteria and the degradation was followed by measuring the oxygen.
The test item concentration selected as appropriate was 19 mg/L, corresponding to a ThOD of 51.3 mg O2/L per test vessel. concentration. The biodegradation rate is therefore expressed as the percentage BOD (biological oxygen demand) and was calculated for each study day.
The mean oxygen depletion in the inoculum control was 9.9 mg O2/L on day 28.
Both test item replicates did not reach the 10 % level (beginning of biodegradation) until test end. The biodegradation remained in the range 0-3 % until test end and the 60 % pass level was not reached within 28 days. The validity criteria of the guidelines are fulfilled.
The test item is classified as not readily biodegradablewithin 28 days.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
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