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EnglishEdit

 
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i-butane (2-methyl-propane)
 
n-butane

EtymologyEdit

IUPAC nomenclature, from but-(four carbon prefix) + -ane(alkane suffix), the former is derived from the same stem as the foul-smelling carboxylic acid liberated in rancid butter, "butyric acid", hence cognate with butter.

NounEdit

butane ‎(countable and uncountable, plural butanes)

  1. (organic chemistry) A hydrocarbon (either of the two isomers of C4H10 n-butane, and 2-methyl-propane) found in gaseous petroleum fractions.
  2. (organic chemistry, uncountable) The n-butane isomer only.

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