Registration Dossier
Registration Dossier
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EC number: 921-577-3 | CAS number: 1174918-60-5
Endpoint summary
Administrative data
Description of key information
Additional information
n-pentane and 2-methylbutane are considered to be readily biodegradable on the basis of proprietary, GLP compliant, guideline studies (Exxon, 1996 and Givens, 1997).
The substances are expected to have a low potential for bioaccumulation and adsorption to soil and sediment based on the measured log Kow’s ranging from 3 – 3.45 (Lide et al, 2008). Structural analysis of the substances 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 the pentanes indicate that the majority of the substances will ultimately be distributed to the atmosphere where they are quickly photooxidised. The photooxidative half lives for 2-methylbutane, cyclopentane and n-pentane are 2.3 (Atkinson, 1985), 3.2 (Droege and Tully, 1987) and 3.95 (Atkinson, 1985) days respectively.
Based on this information the Hydrocarbons, C5, n-alkanes,isoalkane
are not expected to persist in the environment because as they are readily biodegradable, have a low potential for adsorption to organic matter and low potentials for bioaccumulation.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.
