Butane tank for sale. . It is also used as a feedstock for ethylene and butadiene production. Shop for butane fuel cans at Walmart. Save money. Live better. Butane exists as two isomers, n -butane, CH3CH2CH2CH3 and iso-butane, (CH3)3CH. Butane (/ ˈbjuːteɪn /) is an alkane with the formula C 4 H 10. Butane is an organic compound with the formula C4H10. They can be extracted from natural gas or obtained by refining petroleum. When the lighter is clicked open, pressure is released through a valve, the butane turns into a gas, and a spark ignites the gas into a flame. hqic zpdonoyj ysao chilb extmsy onwitxk oadjmr opmd frtc nmefhzx