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EC number: 281-897-8
CAS number: 84057-80-7
The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations.
In a short term
respiration test with activated industrial sludge an EC20 value > 100
mg/L was measured [BASF AG, 1978]. In this study, the test solution was
not buffered, resulting in low pH in the test solution. Aqueous
solutions of calcium propionate do not display significant changes in pH
and are less toxic to aquatic microorganisms. For calcium propionate the
EC20 value for respiration inhibition of activated domestic sludge was
determined to range between 500 and 1040 mg/L [BASF AG, 1989].
on the toxicity to microorganisms are available from growth inhibition
tests with Pseudomonas putida. The 17 h EC50 values for the cell growth
inhibition of Pseudomonas putida differed between 59.6 mg/L for
propionic acid [BASF AG, 1987] and 506.02 mg/L for calcium propionate
[BASF AG, 1989].
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