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EC number: 201-224-3
CAS number: 79-77-6
The inhibition of the degradation activity of activated sludge is not anticipated when introduced in apporpriate low concentrations.
Several studies on the toxicity of Beta-Ionon to microorganisms are
available. The key information is given by a study following OECD 209
and ISO 8192. Changes in the respiration rate induced by the substance
in activated sludge was tested. After 180 minutes an EC50 of 100 - 200
mg/l was determined (Givaudan, 1991). Two other studies according to ISO
DIS 8192, part B, draft 1984 by BASF showed EC20 and EC50 values of
about 1000 mg/L (BASF AG 1988).
A study on Pseudomonas putida performed according to Robra, 1976
(GWF-Wasser/Abwasser 117, 80-86) detected an EC50 > 1000 mg/l after 30
minutes (BASF AG, 1988).
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