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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 202-943-5 | CAS number: 101-43-9
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 cyclohexyl methacrylate is introduced into biological treatment plants in appropriately low concentrations. An EC20 of ca. 450 mg/L was determined (domestic activated sludge, OECD TG 209).
Key value for chemical safety assessment
- EC50 for microorganisms:
- 900 mg/L
Additional information
In a test with domestic activated sludge the inhibition of oxygen consumption was examined according to OECD guideline 209 (BASF AG, 2004). After 30 minutes no inhibition of the oxygen uptake was observed. The 30-min EC50 was determined to be approx. 900 mg/L, the EC20 450 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.
