Registration Dossier
Registration Dossier
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EC number: 271-176-6 | CAS number: 68516-73-4
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations. IC20 (3h) > 100 mg/L (nominal) for activated sludge (OECD 209)
Key value for chemical safety assessment
Additional information
The influence on the respiration of microorganisms was investigated for one ‘yellow disazo condensation pigment’ (CAS 5580-57-4) in a guideline study according to OECD 209 (Solvias AG, 2000). The study was conducted with activated sludge from a municipal sewage treatment plant, which predominantly receives domestic sewage. Up to the highest test concentration of 100 mg/L (nominal) no inhibition on respiration observed after 3 hours of exposure.
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