Registration Dossier
Registration Dossier
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EC number: 201-143-3 | CAS number: 78-79-5
Endpoint summary
Administrative data
Description of key information
Additional information
Isoprene is not considered to be readily biodegradable, although it does have the potential to biodegrade to a significant level in the environment. Isoprene is also expected to have low potential for bioaccumulation and adsorption to soil and sediment based on its experimental log Kow of 2.42. Structural analysis of the isoprene molecule indicates that it is not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional groups. If released to the atmosphere isoprene would quickly photooxidise with an estimated half-life of 3.8 hours.
Isoprene is not expected to persist in the environment because, although not readily biodegradable, it is expected to biodegrade significantly, has 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, isoprene is considered to be not P/vP and not B/vB.
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