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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).
No vapour pressure data were available for any of the streams in 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), Propane, 2-methyl- (CAS 75-28-5).
The vapour pressure was determined at 20-25 °C, some of which are
extrapolation from results at lower temperatures. No information on the
methods used is available but this information is taken from a reliable,
peer-reviewed handbooks and is considered reliable and suitable for use
for this endpoint.
The vapour pressures of the representative constituents of this Category
were found to range from 168 kPa to 1750 kPa.
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