Registration Dossier
Registration Dossier
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EC number: 293-260-1 | CAS number: 91052-98-1
Endpoint summary
Administrative data
Description of key information
Additional information
No measured data are available for the biodegradation for any of the streams within this Category. As streams within this Category are gases at standard temperature and pressure, they are expected to partition primarily to air.
Use of QSAR estimates predicts that streams within this Category will degrade rapidly in the environment. Isobutene and Butane were all shown to be readily biodegradable. Isobutane was deemed not readily biodegradable due to having a Biowin5 (MITI Linear model) of 0.4898 and Biowin 7 (anaerobic linear) of 0.4315. However, Biowin 2 (non-linear model), Biowin 3 (ultimate biodegradation time) and Biowin 6 (MITI non-linear model) did not meet the screening criteria for Persistence in the PBT Assessment. In addition, a second model (BioHCWin v1.01) predicts that isobutene, but-1-ene, isobutane and butane will biodegrade rapidly with a half life of between 1.9 and 3.2 days. Therefore it is considered that this Category is readily biodegradable.
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.
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