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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Members of the butenes category are considered to be readily biodegradable on the basis of a weight of evidence approach using data from QSARs and studies that have isolated but-1-ene degrading micro-organisms. The butenes are also expected to have low potentials for bioaccumulation and adsorption to soil and sediment based on their measured log Kow of 2.31 to 2.4. Structural analysis of the butene molecules indicates that they are not expected to undergo hydrolysis in the environment due to the lack of hydrolysable functional groups. The physico-chemical properties of butenes indicate that the majority of the substances will ultimately be released to the atmosphere where they are quickly photo-oxidised in approximately 0.5 days to 0.75 days.
The butenes are not expected to persist in the environment because they are predicted to degrade rapidly, have a low potential for adsorption to organic matter and have a low potential for bioaccumulation. Therefore, in the PBT assessment, butenes are considered to be not P/vP and not B/vB.
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.
