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EC number: 203-347-8
CAS number: 105-95-3
Key study, OECD 301B and EU Method C.4-C, GLP, reliability 1:100% biodegradation after 28 days, 10-day window was met.Readily biodegradable.
One valid key study is available to assess
the readily biodegradability of the substance. This study was performed
according to EU Method C.4 -C and OECD Guideline 301B with GLP
statement, in an aerobic aqueous medium with microbial activity
introduced by inoculation of activated sludge.
The substance was tested in duplicate at c.a
37 mg per 2 liters, corresponding to ca. 12 mg TOC/L. The organic carbon
content was based on the molecular formula. Two inoculum blank bottles
(with only inoculum), one positive control bottle (with reference
substance (sodium acetate, TOC = 12 mg/L) and inoculum) and one toxicity
control bottle (with reference substance, test substance and inoculum)
were performed. The amount of CO2 produced was determined by titrating
the remaining Ba(OH)2 with 0.05M standardized HCl.
The theoretical CO2 production (ThCO2) of
the substance was calculated to be 2.44 mg CO2/mg. The relative
degradation values calculated from the measurements performed during the
test period revealed complete degradation of the substance. Furthermore,
biodegradation of the substance of at least 60% was reached within 10
days of biodegradation exceeding 10%. Thus the criterion for ready
biodegradability was met. In the toxicity control, the substance was
found to be not inhibitory.
In conclusion, the substance was considered
readily biodegradable under the conditions of the modified Sturm test.
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