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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 (3 h) = 393.3 mg/L (activated sludge);

EC10 (3 h) = 32.1 mg/L (activated sludge)

Key value for chemical safety assessment

EC50 for microorganisms:
393.3 mg/L
EC10 or NOEC for microorganisms:
32.1 mg/L

Additional information

The influence of the test item 3-Mercaptopropionic acid on the respiration of activated sludge was investigated by Feil (2009) in a 3 hour laboratory study according to the OECD Guideline 209. The resulting inhibitions of the respiration rates based on nominal concentrations of the test item were EC10 = 32.1, EC20 = 76.1, and EC50 = 393.3 mg/L, respectively.