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EC number: 939-704-6 | CAS number: -
The results of the key study, which is appropriate for the assessment of ready biodegradability, show s that the substance is readily biodegradable.
The result of the key study is supported by one other ready biodegradation study which shows that 63% of the test material was biodegraded within 28 days, based on DOC and maximum 66.4% based on CO2 evolution.
Four further ready biodegradation experiments confirm that the substance is well biodegradable under OECD 301 testing conditions: Within 28 days of incubation, total maximum 48% to 54% of the test substance were biologically degraded, depending on the test design and the sludge which was used to run the tests. One of the studies shows a biodegradation of 28%.
All findings are summarized below:
Table – Summary of Ready Biodegradation results
127 mg/L (test item)
67 mg/L (ThOD)
Biodegradation based on ThOD (based on elementary analysis
86,8% (one replicate)
Average if 64,3% and 61,3%
348 mg/L (test item)
203 mg/L (ThOD)
52,1% ± 4.2
Average of 47,3%, 53,7% and 55,2%
128 mg/L (test item)
20 mg/L (TOC)
CO2evolution (IC measurement). Biodegradation evaluation based on TOC
Average of 66.4% and 53.1%
DOC (Day 28)
175 mg/L (test item)
100 mg/L (COD)
BOD (OxiTop). Biodegradation evaluation based on COD (ThOD unknown)
Average of 51.7% and 55.8%
DOC (day 28)
35 mg/L (test item)
50 mg O2/L (oxygen demand)
Biodegradation based on ThODNH3
Average of 39%and 56%
20 mg/L (test item)
8,38 mg C/L
CO2evolution (titration). Biodegradation evaluation based on ThCO2
Average of 26% and 29%
Pass level for surfactants: 60%. The 10 -day window should not be applied in this case, as the test material is a mixture of structurally similar chemicals, and not a monoconstituent substance.
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