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EC number: 449-400-0
CAS number: 25822-43-9
A study was performed to determine the
potential for ready biodegradation of the test item by the carbon
dioxide (CO2) evolution method following OECD 301B, adopted in 1992. The
CO2 released upon biodegradation of the test item and the reference
substance sodium benzoate was measured. Two blank controls (containing
only inoculum) and a toxicity control (containing inoculum, reference
and test substances) were established to account for background CO2
production and toxicity of the test item, respectively. All validation
criteria were fulfilled. The sodium benzoate controls had degraded > 60
% at day 8. Based on the CO2 analysis, there was no biodegradation
observed for the test item within the 28 days. The degradation of the
test item was therefore less than the minimal guideline demand of 60
%.Therefore the test item is considered to be not readily biodegradable.
Biodegradation in water and sediment:
Biodegradation in soil
Direct and indirect exposure of the test
item to water, sediment and soil is unlikely. The test substance is
practically insoluble in water. In addition, low exposure is guaranteed,
as no sludge application from STP on soil will be done and aerial
deposition is negligible. Thus, simulation testing for biodegradation in
water, sediment and soil was considered not scientifically justified.
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