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Toxicity to microorganisms

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Description of key information

OECD 209 Activated sludge respiration inhibition 3 hour EC50 421 mg/L, EC10 233 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
421 mg/L
EC10 or NOEC for microorganisms:
233 mg/L

Additional information

The toxicity of the test item OLEIC_DimerFA_TETA_PAA (batch no.: BB 100860 V1) to activated sludge was determined in accordance with OECD Test Guideline 209 at Akzo Nobel, Arnhem, The Netherlands.


The toxicity of OLEIC_DimerFA_TETA_PAA to activated sludge was determined at a contact time of 3 hours, using various concentrations of the test substance.


The EC50of OLEIC_DimerFA_TETA_PAA for activated sludge after 3 hours contact time is 421 mg/L. The EC10,EC20 and EC80valuesare 233, 285 and 621 mg/L, respectively.


OLEIC_DimerFA_TETA_PAA is therefore considered not harmful to activated sludge.