> as lemmas
isobutane
isobutane n.
Brit. 
/ˌʌɪsə(ʊ)ˈbjuːteɪn/
, /ˌʌɪsə(ʊ)ˈbjuːteɪn/U.S. /ˌaɪsoʊˈbjuˌteɪn/
2-methylpropane, (CH3)2CH·CH3, a gaseous hydrocarbon used as a fuel./ˌaɪsoʊˈbjuˌteɪn/ΘΚΠ
society > occupation and work > materials > fuel > chemical fuel > [noun] > gaseous, vaporous, or vaporized
oxyhydrogen1823
acetylene1860
isobutane1876
albo-carbon1878
mixture1878
producer gas1883
astatki1885
hydrazine1887
oxy-gas1900
oxyacetylene1907
suction gas1907
propane gas1930
oxy-propane1963
oxy-fuel1967
syngas1975
autogas1982
the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > alkanes > branched-chain
isobutane1876
isoparaffin1876
isopentane1876
phytane1907
isooctane1909
pristane1923
triptane1943
1876 Jrnl. Chem. Soc. 29 540 When isobutane is heated to 250° with iodine trichloride it gives the same products as propane.
1936 Nature 23 May 862/2 The manufacture of butane and isobutane in Great Britain has been undertaken by Imperial Chemical Industries, Ltd.,..and the gas is being marketed as ‘Calor’ gas.
1959 Times Rev. Industry Aug. 98/2 Other processes..include alkylation, in which iso-butane is reacted with olefins to produce high octane material for aviation gasoline and high quality motor spirit.
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