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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-910-8 | CAS number: 111-81-9
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
The toxicity of methyl undecylenate towards microorganisms was assessed by activated sludge respiration assay, performed according to OECD guideline under GLP. According to the study report, methyl undecylenate does not affect the respiration of activated sludge in the conditions of the test up to a concentration of 1 mg/L (limit of solubility). According to the toxicity testing Elf Atochem (1995) performed in the framework of an OECD 301B test using a readily biodegradable substance as a control, no toxicity to microorganisms was seen up to 28.2 mg/L. A NOEC for PNECstp derivation is derived: NOEC = 28.2 mg/L.
Key value for chemical safety assessment
- EC10 or NOEC for microorganisms:
- 28.2 mg/L
Additional information
The toxicity of methyl undecylenate towards microorganisms was assessed by activated sludge respiration assay, performed according to OECD 209 guideline under GLP and therefore rated Klimisch 1. According to the study report, methyl undecylenate does not affect the respiration of activated sludge in the conditions of the test up to a concentration of 1 mg/L (limit of solubility). According to the toxicity testing Elf Atochem (1995) performed in the framework of an OECD 301B test using a readily biodegradable substance as a control, no toxicity to microorganisms was seen up to 28.2 mg/L. The NOEC for PNECstp derivation is therefore equal to 28.2 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.
