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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

No toxic effects on microorganisms were observed up to the limit of water solubility, no PNEC is derived.

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Within the fatty acid category studies describing the toxicity of fatty acids toPseudomonas putida are available. For the stearic acid C18 (CAS 57 -11 -4) a cell multiplication inhibition test was conducted following GLP-requirements. The used method in the test was similar to the ISO guideline 10712. In the study an EC10 (18 h) of 883 mg/L (nominal) (Coenen, 1989) was reported. Concluding from the results of this study stearic acid is regarded to be not toxic to microorganisms. As no toxic effects on microorganisms were observed up to the limit of water solubililty, no PNEC is derived.