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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 251-201-7 | CAS number: 32764-98-0
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Biodegradation: readily biodegradable, >=61 % degrad. (28-d) , OECD301D, Demares-Koopmans 2013
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The ready biodegradability test was carried out according to OECD 301D (Ready Biodegradability: Closed Bottle Test)guidelines. The test substance, at a concentration of 1 mg/l and 3 mg/l, was exposed to secondary effluent activated domestic sewage sludge micro-organisms with mineral medium in sealed vessels at between 21.8 and 22.4°C for 28 days. Control solutions with inoculum and the reference substance, sodium acetate, together with a toxicity control were used for validation purposes. Oxygen concentration measurements were in duplicate; immediately at the start of the experiment (day 0), and at day 7, 14, 21 and 28. The relative biodegradation values calculated from the O2 measurements performed during the test period of 28 days revealed significant biodegradation of test substance at both concentrations. Mean biodegradation values between 62% and 71% were observed at 1 mg/l and values between 59% and 77% were observed at 3 mg/l. Biodegradation of at least 60% was reached within 14 days of biodegradation exceeding 10%. The test substance confirmed that mean biodegradation of at least 60% was reached within14 days of biodegradation exceeding 10%. In the toxicity control, the test substance was found not to inhibit microbial activity. All of the validity criteria for the test were met. The substance can be considered to be readily biodegradable.
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.
