Dimethyl ether
The simplest ether / From Wikipedia, the free encyclopedia
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Not to be confused with dimethoxyethane.
Dimethyl ether (DME; also known as methoxymethane) is the organic compound with the formula CH3OCH3, (sometimes ambiguously simplified to C2H6O as it is an isomer of ethanol). The simplest ether, it is a colorless gas that is a useful precursor to other organic compounds and an aerosol propellant that is currently being demonstrated for use in a variety of fuel applications.
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Methoxymethane[1] | |||
Other names | |||
Identifiers | |||
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3D model (JSmol) |
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Abbreviations | DME | ||
1730743 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.003.696 ![]() | ||
EC Number |
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KEGG |
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MeSH | Dimethyl+ether | ||
PubChem CID |
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RTECS number |
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UNII | |||
UN number | 1033 | ||
CompTox Dashboard (EPA) |
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Properties | |||
C2H6O | |||
Molar mass | 46.069 g·mol−1 | ||
Appearance | Colorless gas | ||
Odor | Ethereal[2] | ||
Density | 2.1146 kg m−3 (gas, 0 °C, 1013 mbar)[2] 0.735 g/mL (liquid, −25 °C)[2] | ||
Melting point | −141 °C; −222 °F; 132 K | ||
Boiling point | −24 °C; −11 °F; 249 K | ||
71 g/L (at 20 °C (68 °F)) | |||
log P | 0.022 | ||
Vapor pressure | 592.8 kPa[3] | ||
−26.3×10−6 cm3 mol−1 | |||
1.30 D | |||
Thermochemistry | |||
Heat capacity (C) |
65.57 J K−1 mol−1 | ||
Std enthalpy of formation (ΔfH⦵298) |
−184.1 kJ mol−1 | ||
Std enthalpy of combustion (ΔcH⦵298) |
−1460.4 kJ mol−1 | ||
Hazards | |||
GHS labelling:[4] | |||
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Danger | |||
H220, H280 | |||
P210, P377, P381, P403 | |||
NFPA 704 (fire diamond) | |||
Flash point | −41 °C (−42 °F; 232 K) | ||
350 °C (662 °F; 623 K) | |||
Explosive limits | 27 % | ||
Safety data sheet (SDS) | ≥99% Sigma-Aldrich | ||
Related compounds | |||
Related ethers |
Diethyl ether | ||
Related compounds |
Ethanol | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dimethyl ether was first synthesised by Jean-Baptiste Dumas and Eugene Péligot in 1835 by distillation of methanol and sulfuric acid.[5]