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Toxicity to microorganisms

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Description of key information

Guideline 209: Activated Sludge, Respiration Inhibition Test (Carbon and Ammonium Oxidation). Reliability=K1;

Under the test conditions, BPAF/BPAF:BTPP-Salt showed no inhibition at the 100 mg/L dose level and slight inhibition at the 10 and 1000 mg/L dose levels, 1.77% and 13.06%. The EC15 and EC50 values were not attainable as the highest dose level tested has a mean inhibition rate of 13.06%. The abiotic treatment mixture with dose level of 1000 mg/L of the test substance had a respiration rate of 0.0 showing there was no significant uptake or released of oxygen resulting from abiotic reactions.

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L

Additional information