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Substance Name: Methane
RN: 74-82-8
UNII: OP0UW79H66
InChIKey: VNWKTOKETHGBQD-UHFFFAOYSA-N

Note

  • The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed)

Molecular Formula

  • C-H4

Molecular Weight

  • 16.0426
 

Classification Codes

  • 2007 CERCLA Priority List, Rank: 66
  • 2011 CERCLA Priority List, Rank: 69
  • Simple Asphyxiant
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Names and Synonyms

Name of Substance

  • Methane

MeSH Heading

  • Methane

Synonyms

  • 4-01-00-00003 (Beilstein Handbook Reference)
  • Biogas
  • BRN 1718732
  • EC 200-812-7
  • EINECS 200-812-7
  • Fire Damp
  • HSDB 167
  • Marsh gas
  • Methane
  • Methyl hydride
  • R 50 (refrigerant)
  • UNII-OP0UW79H66

Systematic Names

  • Methane
  • Methane in gaseus state

Superlist Names

  • Methane
  • Methane, compressed or natural gas, compressed (with high methane content)
  • Methane, compressed or natural gas, compressed (with high methane content) [UN1971] [Flammable gas]
  • Methane, refrigerated liquid (cryogenic liquid) or natural gas, refrigerated liquid (cryogenic liquid) (with high methane content)
  • Methane, refrigerated liquid (cryogenic liquid) or natural gas, refrigerated liquid (cryogenic liquid) (with high methane content) [UN1972] [Flammable gas]
  • UN1971
  • UN1972

Registry Numbers

CAS Registry Number

  • 74-82-8

FDA UNII

  • OP0UW79H66

Other Registry Number

  • 131452-56-7

System Generated Number

  • 0000074828

Structure Descriptors

InChI

1S/CH4/h1H4

InChIKey

VNWKTOKETHGBQD-UHFFFAOYSA-N

Smiles

C

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point -1.82E+02 deg C   EXP
Boiling Point -1.62E+02 deg C   EXP
log P (octanol-water) 1.09 (none)   EXP
Water Solubility 22 mg/L 25 EXP
Vapor Pressure 4.66E+05 mm Hg 25 EXP
Henry's Law Constant 0.658 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 6.86E-15 cm3/molecule-sec 25 EXP

Physical property data is provided to ChemIDplus by SRC, Inc.