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EC number: -
CAS number: -
The test item and the polyvalent inoculum from an activated sewage plant
dealing predominantly with domestic sewage are incubated together in a
mineral nutrient medium at a temperature range of 19 to 25°C. The test
item is the sole carbon and energy source. The conversion into CO2 was
quantified by titration of the remaining bariumhydroxide with HCl.
Comparing the amount of CO2 produced upon degradation of the test item
with the theroretical amount of CO2 (ThCO2) the percentage of
degradation is calculated.
The threshold of "ready biodegradability" of >= 60% was not met within
both test solutions. The mean value of 29% is lower than the pass value
of the OECD Guideline 301B. The 10-Days-Window as indicated in the OECD
test guideline 301B was not met within bith treatmens with the test
item. Thus the test item can be termed "not readily biodegradable".
According to the results of the toxicity control, a toxic effect
towards microorganisms at the concentration tested can be excluded.
A test for Inherently Biodegradability according to OECD 302B was
performed on the test item. The test item was degraded 53% in 28 days.
Therefore, it must be considered "inherently degradable" according to
OECD 302B. The test is considered valid because the control item sodium
benzoate was degraded > 99.9% within 7 days. The toxicity control run in
parallel indicates that the test item does not exhibit any toxic effect
towards the bacteria in the test treatment at the concentration used in
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