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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when Isobutyl acrylate is introduced into biological treatment plants in appropriately low concentrations.
EC20 (30 min) > 1000 mg/L (domestic activated sludge, OECD TG 209)

Key value for chemical safety assessment

Additional information

In a test with domestic activated sludge the inhibition of oxygen consumption was examined according to OECD TG 209 and in compliance with GLP regulations (BASF AG, 2001). After 30 minutes incubation, no inhibition of oxygen uptake was observed at the only test concentration of 1000 mg/L. The validity of the test and the suitability of the used sludge was confirmed by the performance of the reference substance 3,5-dichlorophenol (EC20 = approx. 1.8 mg/L).

EC20 > 1000 mg/L

In addition, there is an older study conducted according to the national German Standard DIN 38412, part 27 in which the effect of Isobutyl acrylate on the oxygen consumption of Pseudomonas putida was determined after an incubation time of 30 min (BASF AG 1992). The EC10 (30 min) was 2850 mg/L.