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EC number: 205-517-7
CAS number: 141-98-0
Biodegradation of test substance and reference substance tested
seperately and in combination.
Test substance was tested in a concentration of 2.2 mg/l and reference
substance in a concentration of 2.0 mg/l.
The substance was found to be not biodegradable under the test
conditions within the 28-day exposure period.
The oxygen consumption in the activity control showed that the activity
of the inoculum was satisfactory.
In the toxicity control containing both the test substance and the
reference item sodium benzoate no inhibitory effect on microorganisms in
inoculum was observed.
In the procedure controls the reference item sodium benzoate was readily
biodegraded by an average of 72.6 % within 14 days of exposure; thus
confirming suitability of the activated sludge
The test item can not be considered readily biodegradable.The pass level for ready biodegradability, 60% of ThOD, was not accomplished during 28 days.After 21 days ThOd corresponded to 6.7 ±2.1 % . After 28 days the value was 2.1±1%.
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