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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
- All
- Classifications
- Links to Resources
- Names & Synonyms
- Registry Numbers
- Structure Descriptors
- Physical Properties
Classification Codes
- 2007 CERCLA Priority List, Rank: 66
- 2011 CERCLA Priority List, Rank: 69
- Simple Asphyxiant
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Links to Resources
NLM Resources (File Locators)
Regulatory Agencies (Superlist Locators)
Other Resources (Internet Locators)
Search for this InChIKey on the Web
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/h1H4InChIKey
VNWKTOKETHGBQD-UHFFFAOYSA-NSmiles
CPhysical 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.