Ethane

Ethane
	Skeletal formula of ethane with all hydrogens and carbons shown Molecular geometry of ethane based on rotational spectroscopy.
	Skeletal formula of ethane with all implicit carbons shown, and all explicit hydrogens added
Ball and stick model of ethane	Spacefill model of ethane
Names
	Preferred IUPAC name Ethane
	Systematic IUPAC name Dicarbane (never recommended)
	Other names Dimethyl (CH3CH3, Me2 or (CH3)2); Ethyl hydride;
Identifiers
CAS Number	74-84-0 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1730716
ChEBI	CHEBI:42266 ;
ChEMBL	ChEMBL135626 ;
ChemSpider	6084 ;
ECHA InfoCard	100.000.741
EC Number	200-814-8;
Gmelin Reference	212
MeSH	Ethane
PubChem CID	6324;
RTECS number	KH3800000;
UNII	L99N5N533T ;
UN number	1035
CompTox Dashboard (EPA)	DTXSID6026377 ;
	InChI InChI=1S/C2H6/c1-2/h1-2H3 Key: OTMSDBZUPAUEDD-UHFFFAOYSA-N ;
	SMILES CC;
Properties
Chemical formula	C2H6
Molar mass	30.070 g·mol−1
Appearance	Colorless gas
Odor	Odorless
Density	1.3562 kg/m3 (gas at 0 °C); ; 544.0 kg/m3 (liquid at -88.5 °C); 206 kg/m3 (at critical point 305.322 K)
Melting point	−182.8 °C; −296.9 °F; 90.4 K
Boiling point	−88.5 °C; −127.4 °F; 184.6 K
Critical point (T, P)	305.32 K (32.17 °C; 89.91 °F) 48.714 bars (4,871.4 kPa)
Solubility in water	56.8 mg/L
Vapor pressure	3.8453 MPa (at 21.1 °C)
Henry's law; constant (kH)	19 nmol Pa−1 kg−1
Acidity (pKa)	50
Basicity (pKb)	−36
Conjugate acid	Ethanium
Magnetic susceptibility (χ)	−37.37·10−6 cm3/mol
Thermochemistry
Heat capacity (C)	52.14± 0.39 J K−1 mol−1 at 298 Kelvin
Std enthalpy of; formation (ΔfH⦵298)	−84 kJ mol−1
Std enthalpy of; combustion (ΔcH⦵298)	−1561.0–−1560.4 kJ mol−1
Enthalpy of fusion (ΔfH⦵fus)	9.76 kJ/mol at −182 °C
Enthalpy of vaporization (ΔfHvap)	14.703 kJ/mol at −89.0 °C
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220
Precautionary statements	P203, P210, P222, P280, P377, P381, P403
NFPA 704 (fire diamond)	1 4 0 SA
Flash point	−135 °C (−211 °F; 138 K)
Autoignition; temperature	472 °C (882 °F; 745 K)
Explosive limits	2.9–13%
Safety data sheet (SDS)	inchem.org
Related compounds
Related alkanes	Methane; Propane; Butane;
Related compounds	Disilane; Digermane;
Supplementary data page
	Ethane (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

Ethane (US: /ˈɛθeɪn/ ETH-ayn, UK: /ˈiːθeɪn/ EE-thayn) is a naturally occurring organic chemical compound with the chemical formula C
₂H
₆. At standard temperature and pressure, ethane is a colorless, odorless gas. Like many hydrocarbons, ethane is isolated on an industrial scale from natural gas and as a petrochemical by-product of petroleum refining. Its chief use is as feedstock for ethylene production. The ethyl group is formally, although rarely practically, derived from ethane.