Butane is a gas with the formula C₄H₁₀ that is an alkane with four carbon atoms. The term may refer to either of two structural isomers, n-butane or isobutane (or "methylpropane"), or to a mixture of these isomers. In the IUPAC nomenclature, however, "butane" refers only to the n-butane isomer (which is the isomer with the unbranched structure). Butanes are highly flammable, colorless, easily liquefied gases. The name butane comes from the roots but- (from butyric acid) and -ane.

Rotation about the central C-C bond produces two different conformations (trans and gauche) for n-butane.

When oxygen is plentiful, butane burns to form carbon dioxide and water vapor; when oxygen is limited, carbon (soot) or carbon monoxide may also be formed.

The maximum adiabatic flame temperature of butane with air is 2,243 K (1,970 °C; 3,578 °F).

n-Butane is the feedstock for DuPont's catalytic process for the preparation of maleic anhydride:

n-Butane, like all hydrocarbons, undergoes free radical chlorination providing both 1-chloro- and 2-chlorobutanes, as well as more highly chlorinated derivatives. The relative rates of the chlorination is partially explained by the differing bond dissociation energies, 425 and 411 kJ/mol for the two types of C-H bonds. The two central carbon atoms have the slightly weaker C-H bonds.

Michael Render (born April 20, 1975), better known by his stage name Killer Mike, is an American rapper, signed to Grind Time Official through the SMC/Fontana Distribution. He made his debut on "Snappin' and Trappin'" on OutKast's 2000 LP Stankonia, and also appeared on the Grammy-winning song, "The Whole World", the single from OutKast's greatest hits album Big Boi and Dre Present...OutKast. He was featured in the movies 20 Funerals, Idlewild, and ATL.

Killer Mike released his debut album, Monster, in 2003. The album's lead single was "Akshon (Yeah!)", which featured rap group OutKast on guest vocals, and was included on the soundtrack to the 2004 version of EA Sports popular video game Madden NFL. He even made a Madden '04 remix of "Akshon (Yeah!)" for the game. The album's second single was "A.D.I.D.A.S.", featuring Big Boi and Sleepy Brown, which peaked at #60 on the Billboard Hot 100. It is Killer Mike's highest charting single to date as a lead artist. The song's title was an acronym for "All day I dream about sex". Following the release of his own material, he appeared on "Flip Flop Rock" and "Bust" on the Speakerboxx half of Speakerboxxx/The Love Below. He also appeared on "Southern Takeover" with Pastor Troy on Chamillionaire's CD The Sound of Revenge. Killer Mike appeared on the song "Never Scared" by fellow rapper Bone Crusher, also with T.I., from AttenCHUN! It peaked at #26 on the Hot 100, becoming Mike's first top 40 hit. The song was also used on the Madden NFL 04 game and even by the Atlanta Braves for their 2003 season. His second album Ghetto Extraordinary has had its release date pushed back several times due to disputes between Big Boi and Sony Records.