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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 246-689-3 | CAS number: 25167-67-3
Endpoint summary
Administrative data
Description of key information
Additional information
Butenes are not expected to hydrolyse based on a lack of hydrolysable functional groups. However, according to Atkinson (1985), a rate constant for reaction with hydroxyl radicals of 3.14 E-11 cm3/mol/sec for but-1-ene and 5.14 E-11 cm3/mol/sec for 2-methylpropene is recommended. These rate constants equate to half-lives of 12 and 7.5 hours respectively. These data indicate that indirect photolysis is expected to contribute significantly to degradation of butenes in the environment.
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.
