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EC number: 295-405-4
CAS number: 92045-23-3
A complex combination of hydrocarbons produced by the distillation of the products of a steam cracking process. It consists predominantly of hydrocarbons having a carbon number of C4, predominantly 1-butene and 2-butene, containing also butane and isobutene and boiling in the range of approximately minus 12°C to 5°C (10.4°F to 41°F).
Partition coefficient data were not available for any of the streams
within this Category. However, data were read across from the main
hydrocarbon C4 constituents in this Category. The representative
constituents of the category studied and used as supporting read-across
are But-1-en-3-yne (CAS 689-97-4), But-1-ene (CAS 106-98-9), But-2-ene,
cis- (CAS 590-18-1), But-2-ene, trans- (CAS 624-64-6), Buta-1,2-diene
(CAS 590-19-2), Buta-1,3-diene (CAS 106-99-0), Butane (CAS 106-97-8),
Prop-1-ene, 2-methyl- (CAS 115-11-7), and Propane, 2-methyl- (CAS
The partition coefficients presented in the dossier are compilation of
QSAR data and data from peer review handbooks. KOWWIN v1.68 model of Epi
Suite has been used as key QSAR. No information on the test methods used
is available in the handbooks; however, as the information is taken from
peer reviewed handbooks and it can be considered reliable and suitable
for use as the key study for this endpoint.
The partition coefficients of the representative constituents of this
Category range from 1.40 to 2.89.
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.
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