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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).
DN(M)EL for acute effects should be derived if an acute
hazard leading to acute toxicity (eg. C&L) has been
identified and there is a potential for high peak
exposures. This is not the case with members of this
marker substance with the highest relative hazard
potential was selected. Long term systemic effects are
therefore defined by the carcinogenicity of
1,3-butadiene in humans.
The DMEL of 2.21 is equivalent to 1ppm.
DMEL for acute effects should be derived
if an acute hazard leading to acute
toxicity (eg. C&L) has been identified
and there is a potential for high peak
exposures. This is not the case with
members of this category.
marker substance with the lowest DMEL
was selected for population effects as
these are most protective. Long term
systemic effects are therefore defined
by the carcinogenicity of 1,3-butadiene
main use of hydrocarbon streams are as
intermediates and monomers, hence
exposure of the general population is
likely to be low.
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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