Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 938-781-3 | CAS number: 117527-94-3
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 to biological treatment plants in appropriate low concentrations.
Key value for chemical safety assessment
Additional information
The effect of the test substance on the respiration of activated sewage sludge was studied according to OECD 209 and under GLP (RCC Ltd. 2005). Based on the results of a preliminary non GLP range-finding test, activated sewage sludge was exposed to the test substance at the limit concentration of 100 mg/L for a period of 3 hours with the addition of a synthetic sewage as a respiratory substrate. 3,5-dichlorophenol was tested as positive control at concentrations of 5, 16 and 50 mg/L and resulted in a 3-hour EC50 value of 17 mg/L. However, no effects of the test substance could be observed after three hours contact time. Thus, the 3-hour NOEC of the test substance to activated sludge microorganisms is >= 100 mg/L. The 3-hour EC20, EC50 and EC80 were clearly higher than 100 mg/L.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
