Registration Dossier
Registration Dossier
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Reaction mass of copper complex of [(2,6-difluoroheterocycl-4-yl)amino]hydroxy{[2-hydroxy-3-sulfonato-5-(vinylsulfonyl)phenyl]diazenyl}naphthalene sulfonic acid, dialkali salt and copper complex of [(2,6-difluoroheterocycl-4-yl)amino]-hydroxy{[2-hydroxy-3-sulfonato-5-{[2-(sulfonatooxy)ethyl]sulfonyl}phenyl]diazenyl}naphthalene sulfonic acid, trialkali salt
EC number: 479-550-2 | CAS number: -
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Under the test conditions employed, the test substance showed 49 % respiration inhibition of activated sludge at a concentration of 10,000 mg/L. The EC50 was determined to be > 10,000 mg/L. This concentration is adopted in lieu of an EC50, since respiration inhibition was indeed close to 50 %.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 10 000 mg/L
Additional information
A study was performed to assess the toxicity of test substance to bacteria according to Commission Directive 88/302/EEC; Official Journal of the EC L133 Part C (1988), and equivalent to OECD guideline 209, in compliance with GLP.
The activated sludge was exposed to the test substance at different concentrations. The respiration rate of each mixture was determined after an aeration period of 3 h. The test substance showed 49 % respiration inhibition of activated sludge at a concentration of 10,000 mg/L. This concentration is adopted in lieu of an EC50, since respiration inhibition was indeed close to 50 %.
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