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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 204-062-1 | CAS number: 115-07-1
Endpoint summary
Administrative data
Description of key information
Additional information
Propene is a gas at standard temperature and pressure and is expected to partition primarily to air, therefore environmental fate tests may not be relevant. Measured data are not available for propene for this endpoint. Due to the practical difficulties associated with the environmental fate testing of gases (i.e. maintaining exposure concentrations) the use of QSAR modelled estimates is an appropriate alternative.
As propene is expected to primarily partition to air, its fate in the atmosphere is an important consideration, although it is not a REACH requirement. Propene is a gas at room temperature and is expected to rapidly degrade by indirect photolysis in air. The dominant process is by reaction with hydroxyl radicals, although it can also react with ozone. Atkinson (1985) recommended a rate constant of 2.63E-11 cm3/mol/sec for the reaction rate with hydroxyl radicals and Atkinson and Carter (1984) recommended a rate constant of 1.13E-17 cm3/mol/sec for the reaction rate with ozone. These rate constants equate to half lives of 14.6 and 23.7 hours respectively. These data indicate that indirect photolysis is expected to contribute significantly to degradation of propene in the environment.
Propene has the potential to rapidly volatilise from surface waters, based on a calculated Henry's Law constant of 1.6E4 Pa.m3/mole. Propene partitioning to water will not undergo hydrolysis, as it does not contain a functional group that can be displaced by nucleophilic substitution. It is expected to have a low potential for bioaccumulation and adsorption to soil and sediment based on its experimental log Kow of 1.77. Data are not available to demonstrate that propene is readily biodegradable, and for the purposes of the risk assessment, ready biodegradability will not be assumed. Data from two biodegradation QSAR models have been calculated for comparison with the screening criteria for persistence in the PBT assessment and to aid the classification and labelling of propene.
Propene is not expected to persist in the environment because, although not readily biodegradable, it is expected to have a low potential for adsorption to organic matter, a low potential for bioaccumulation, and is rapidly degraded in the atmosphere by photooxidation reactions. Therefore, in the PBT assessment, propene is considered to be not P/vP and not B/vB.
The CSA has not identified the need to further investigate the degradation of propene in water, sediment or soil due to the expected partitioning of propene to the atmosphere. Based on the environmental fate data, propene is not expected to persist 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.
