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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The 3-h EC50 value is >1000 mg/L in micro organisms	

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L

Additional information

In a GLP compliant 3 -hour respiration inhibition test, performed according to OECD Guideline 209, the inhibitory effect of the test substance on the respiration rate of aerobic wastewater microorganisms of activated sludge was investigated (Solvias 2003). The nominal concentration were 26, 64, 160, 400, and 1000 mg/L. In addition, two controls and the reference item 3,5-dichlorophenol were tested. The results of these treatments confirmed the suitability of the activated sludge and the method used. The test substance had no significant inhibitory effect on the respiration rate of activated sludge after the incubation period of 3 hours. The 3 -hour EC50 could not be calculated, but was clearly higher than 1000 mg/L.