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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Ecotoxicological information

Toxicity to microorganisms

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Administrative data

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Description of key information

The effect of the test item on the respiration of activated sewage sludge gave a 3-Hour EC50 value of greater than 10000 mg/Land a No Observed Effect Concentration (NOEC) of 10000 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
10 000 mg/L

Additional information

A study was performed to assess the effect of the test item on the respiration of activated sewage sludge. The method followed was designed to be compatible with the OECD Guidelines for Testing of Chemicals No. 209 "Activated Sludge, Respiration Inhibition Test".

Activated sewage sludge was exposed to an aqueous dispersion of the test item at concentrations of 1,10, 100, 1000 and 10000 mg/L for a period of 3 hours at a temperature of 20 ± 2 deg. C with the addition of a synthetic sewage as a respiratory substrate. The rate of respiration was determined after 3 hours contact time and compared to data for the control and a reference item, 3,5-dichlorophenol

The effect of the test item on the respiration of activated sewage sludge gave a 3-Hour EC50 value of greater than 10000 mg/Land a No Observed Effect Concentration (NOEC) of 10000 mg/L.

The reference item gave a 3-Hour EC50 value of 18.0 mg/L.