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EC number: 229-713-7
CAS number: 6674-22-2
The inhibition of the degradation activity
of activated sludge is not anticipated when introduced in appropriately
As a key study concerning acute
toxicity to microorganisms a short-term respiration inhibition test
performed by BASF (1981) according to ISO 8192 was identified, using
domestic activated sludge as inoculum. Respiration was measured after 30
minutes and 180 minutes. The 30 -min EC20
was determined to be 650 mg/L, based on nominal test concentrations.
(BASF AG, 1990).
In addition, there are supporting data from a
growth inhibition test with P. putida available. The study was conducted
according to DIN 38412, p.8. The 17h-EC50 value was 330 mg/L, while the
EC10 value was found to be 210 mg/L (BASF AG, Rep. no.: 9/1900184,
Based on available data, it can be
concluded, that the inhibition of the degradation activity of activated
sludge with DBU (CAS 6674 -22 -2) is not anticipated when introduced in
appropriately low concentrations.
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