Butane 💬

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Butane
Names
	Preferred IUPAC name Butane
	Systematic IUPAC name Tetracarbane (never recommended)
	Other names Butyl hydride; Quartane; R600;
Identifiers
CAS Number	106-97-8 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	969129
ChEBI	CHEBI:37808 ;
ChEMBL	ChEMBL134702 ;
ChemSpider	7555 ;
ECHA InfoCard	100.003.136
EC Number	203-448-7;
E number	E943a (glazing agents, ...)
Gmelin Reference	1148
KEGG	D03186 ;
MeSH	butane
PubChem CID	7843;
RTECS number	EJ4200000;
UNII	6LV4FOR43R ;
UN number	1011
CompTox Dashboard (EPA)	DTXSID7024665 ;
	InChI InChI=1S/C4H10/c1-3-4-2/h3-4H2,1-2H3 Key: IJDNQMDRQITEOD-UHFFFAOYSA-N ;
	SMILES CCCC;
Properties
Chemical formula	C4H10
Molar mass	58.124 g·mol−1
Appearance	Colorless gas
Odor	Gasoline-like or natural gas-like
Density	2.48 kg/m3 (at 15 °C (59 °F))
Melting point	−140 to −134 °C; −220 to −209 °F; 133 to 139 K
Boiling point	−1 to 1 °C; 30 to 34 °F; 272 to 274 K
Solubility in water	61 mg/L (at 20 °C (68 °F))
log P	2.745
Vapor pressure	~170 kPa at 283 K
Henry's law; constant (kH)	11 nmol Pa−1 kg−1
Magnetic susceptibility (χ)	−57.4·10−6 cm3/mol
Thermochemistry
Heat capacity (C)	98.49 J/(K·mol)
Std enthalpy of; formation (ΔfH⦵298)	−126.3–−124.9 kJ/mol
Std enthalpy of; combustion (ΔcH⦵298)	−2.8781–−2.8769 MJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220
Precautionary statements	P210
NFPA 704 (fire diamond)	1 4 0 SA
Flash point	−60 °C (−76 °F; 213 K)
Autoignition; temperature	405 °C (761 °F; 678 K)
Explosive limits	1.8–8.4%
	NIOSH (US health exposure limits):
PEL (Permissible)	none
REL (Recommended)	TWA 800 ppm (1900 mg/m3)
IDLH (Immediate danger)	1600 ppm
Related compounds
Related alkanes	Propane; Isobutane; Pentane;
Related compounds	Perfluorobutane
Supplementary data page
	Butane (data page)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Butane (/ˈbjuːteɪn/) is an alkane with the formula C₄H₁₀. Butane exists as two isomers, n-butane with connectivity CH₃CH₂CH₂CH₃ and iso-butane with the formula(CH₃)₃CH. Both isomers are highly flammable, colorless, easily liquefied gases that quickly vaporize at room temperature and pressure. Butanes are a trace components of natural gases (NG gases). The other hydrocarbons in NG include propane, ethane, and especially methane, which are more abundant. Liquefied petroleum gas is a mixture of propane and some butanes.