Registration Dossier
Registration Dossier
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EC number: 700-503-1 | CAS number: 101238-01-1
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The inhibition of the degradation activity of activated sludge was determined in a test according to OECD guideline 209. Activated sludge was exposed to the test item for 3h and the respiration rate was determined. The effect concentrations were as follows: EC10 = 95 mg/L, EC20 = 160 mg/L, EC50 = 400 mg/L, and EC80 > 1000 mg/L.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 95 mg/L
Additional information
The respiration inhibition of the test substance was assessed in a key study according to the OECD Guideline for Testing of Chemicals No. 209. Non-adapted activated sludge from a domestic sewage treatment plant was exposed for 3h to the test chemical. The nominal test concentrations were 1000, 500, 250, 125, and 62.5 mg/L. The effect concentrations after 3h based on the nominal concentrations were as follows: EC10 = 95 mg/L, EC20 = 160 mg/L, EC50 = 400 mg/L, and EC80 > 1000 mg/L.
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