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EC number: 266-380-7
CAS number: 66492-51-1
Acutely toxic to aquatic organisms. The inhibition of the degradation
activity of activated sludge is not anticipated when introduced in
appropriate low concentrations.
Acute tests on all three trophic levels were performed to examine the
aquatic toxicity of the submission item. Fish turned out to be the most
sensitive species revealing an LC50 (96h) of 4 mg/L. Thus, the
submission item is considered to be acutely toxic to aquatic organisms.
Effects of the submission item towards algae and water flea (Daphnia
magna) were less severe providing an ErC50 (72h) of 34 mg/L for algae
and an EC50 (48h) of 20 mg/L for water flea. Results from several QSAR
estimations using the OECD toolbox and ECOSAR support the conclusion
drawn above on the acute aquatic toxicity of the substance.
No data on aquatic long-term toxicity of the submission item are
The EC10 value of the test item on activated sludge was found to
be 300 mg/L in a GLP guideline study according to OECD 209 (BASF SE
08G0455/11G149, 2012). Hence, the inhibition of the degradation activity
of activated sludge is not anticipated when introduced in appropriate
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