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EC number: 408-210-8
CAS number: 124605-82-9
C.I. DIRECT BLUE 301; DIRECT BLUE 301
The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations.
In an OECD 209 guideline study conducted by Ciba-Geigy in 1990 the
effect of the test substance on the respiration rate of activated sludge
that was derived from a Husman apparatus was determined. After 3 hours
of exposure no adverse effect on the respiration rate was observed and
therefore the EC0 was determined as > 100 mg/L. The inhibition of the
degradation capacity of activated sludge is not anticipated from the
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