Registration Dossier
Registration Dossier
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EC number: 629-705-7 | CAS number: 1228186-15-9
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
- EC50 for microorganisms:
- 872 mg/L
- EC10 or NOEC for microorganisms:
- 71 mg/L
Additional information
In order to predict effects of chemicals in the environment and in biological waste water treatment plants, an activated sludge respiration inhibition test was performed. The toxicity to activated sludge was determined in accordance with OECD Test Guideline 209, and in compliance with the OECD principles of Good Laboratory Practice.
The test is valid as shown by the EC50of the reference compound, 3,5-dichlorophenol (8 mg/L) and the control respiration rates which are within 15% of each other.
The toxicity of quaternary ammonium compounds, benzyl bis (hydrogenated tallow-alkyl) methyl, chlorides to activated sludge was determined at a contact time of 3 hours, using various concentrations of the test substance. The inhibitory effect of quaternary ammonium compounds, benzyl bis (hydrogenated tallow-alkyl) methyl, chlorides at a particular concentration is expressed as a percentage of the two controls.The EC50of quaternary ammonium compounds, benzyl bis (hydrogenated tallow-alkyl) methyl, chlorides for activated sludge after 3 hours contact time is 872 mg/L with 95% confidence limits of 181 and 4.9E+08 mg/L. The EC10, EC20and EC80are 71, 169 and 4504 mg/L, respectively.
Quaternary ammonium compounds, benzyl bis (hydrogenated tallow-alkyl) methyl, chlorides is therefore considered not harmful to activated sludge.
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