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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 introduced in appropriately low concentrations.

Key value for chemical safety assessment

Additional information

Since 2-ethylhexanoyl chloride hydrolyses rapidly and forms 2-ethylhexanoic acid, studies on the toxicity to microorganisms focus on the acid.

The toxicity of 2 -ethylhexanoic acid was tested in a growth inhibition test with Pseudomonas putida according to German Industrial Standard DIN 38412, part 8 (BASF AG, 1988. Report No. 9/0949/88). The 17 -h EC10 was 71.7 mg/L indicating a low toxicity of the acid towards microorganisms. The low toxicity is supported by the results of an oxygen consumption test with Pseudomonas putida according to German Industrial Standard DIN 38412, part 27 (draft). The 30 -min EC0 was determined to be 250 mg/L (BASF AG, 1988, Report No. 10/0949/88).