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EC number: 200-827-9
CAS number: 74-98-6
comparative rates of uptake of 19 hydrocarbon vapours by rats were
determined by a dual-column gas chromatograph method. Representative
compounds from the chemical classes of alkenes, alkynes, straight-chain
and branched alkanes, alicyclics, and aromatics were examined.
absorption following inhalation exposure is reported by Dahl et al to be
low (uptake 0.6 -1.0 nmol/kg/min/ppm, lower than butane at 1.5 -1.8
authors propose that absorption rate increases with molecular weight,
straight chain molecules will be more highly absorbed than branched
isomers, and aromatic molecules will be more highly absorbed than
paraffins. Thus isobutane and butane, which exist as a vapour at room
temperature, is very poorly absorbed, and if absorbed, is normally
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