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EC number: 247-873-6
CAS number: 26650-05-5
The biodegradation of 200 mg test item per litre (164 mg/L ThOD,
concentration ) in the static test was found to be at average 58 %
(53 and 64% in replicate vessels). A plateau was not yet reached on day
28. On day 28, concentration (2) (72 mg/L test substance, 59 mg/L ThOD)
showed lower biodegradation values, average 52% (47 to 58% in replicate
vessels). A plateau was not yet reached after 28 days. The 10% generic
trigger value for biodegradation initiation was reached within latest 2
days after test initiation. Within the day 10 -window, average 49% and
44% biodegradation occurred, respectively. The degradation of the
reference substance sodium benzoate had reached average 88 % (87% and
90%) within the first 14 days. The difference of extremes of replicate
values of the removal of the test item was less than 20% at the end of
the test for 200 mg/L and 72 mg/L, respectively. Therefore, the test is
valid. No inhibitory effects of the test item were observed in the
toxicity control where more than 25 % degradation occurred within 14
days. In conclusion, the substance is not readily biodegradable.
However, with average 58% of biodegradation, the trigger value of 60%
was only marginally failed, whereas one of the two replicates reached
[Type of water: freshwater]
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