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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).
Flammability data were read across from substances with compatible
structure to those in Category C4, high 1,3 -butadiene (≥ 0.1%):
But-1-ene (106-9 -9), 2-methylpropene (115-11-7) and 1,3 butadiene. The
lower and upper explosion limits ranged from 1.6-12%.
data on the flammability of the members of category C4, high 1,3
not available. Therefore read across from handbook data (CRC 2008) from
comparable substances [2-methylpropene: gas LEL 1.8 % - UEL 9.6 %,
1,3–butadiene: gas LEL 2.0 % - UEL 12 %, but-1–ene: gas UEL 1.6 % to
UEL10 %] was deemed appropriate as they have a similar structure to the
category members and so physico-chemical properties are predicted to be
similar. No information on the method used was reported in the handbook.
However, this information is taken from the CRC handbook (2008) which is
a reliable peer reviewed handbook and so can be considered reliable and
suitable for use as the key study for this endpoint.
lower and upper explosion limits are 1.6 - 12 %.
on the explosion limits for the category members (1.6 to 12 %), all
category members are classified as Flammable gas category 1.
The lower and upper explosion limits are 1.6
- 12%.The data would result in a classification of category 1 flammable
gas and the hazard statement 'extremely flammable gas'.
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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