Registration Dossier
Registration Dossier
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EC number: 204-479-9 | CAS number: 121-54-0
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The study was performed according to OECD test guidelines no. 209 on activated sludge. Two tests were conducted, the first of which comprised a preliminary range finding test at nominal concentrations of 1, 10 and 100 mg/l. In the second (definitive) test, Benzethoniumchloride was employed at nominal concentrations of 10, 25, 50, 100 and 250 mg/l. The EC50 of the test substance was calculated from the results of the definitive test to be 35.7 mg/l (95% confidence limits 31.3 - 40.8 mg/l). The EC20 and EC80 were estimated to be 15 and 90 mg/l, respectively.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 35.7 mg/L
Additional information
Source: GLP-report (owner: Lonza)
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