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Dimethylether
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Dimethylether
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(CH3)2O
Dimethylether

Physical Properties

Under solid (grey), liquid (blue) and vapor states (white) along the equilibrium curves

  • General properties
  • Solid phase
  • Liquid Phase
  • Gas Phase
(P)
log(P)
Download
  • Molecular weight
    46.068
    g/mol
  • Content in air
    /

Critical Point

  • Temperature
    127.15
    °C
    260.87 °F 400.3 K
  • Pressure
    53.405
    bar
    5.3405E6 pa 774.5737 lbf/in2 52.7066 Atm 5340.5 Kpa 4.0057E4 mmHg
  • Density
    277.01
    kg/m³
    17.2931 lb/ft³

Triple Point

  • Temperature
    - 141.5
    °C
    - 222.7 °F 131.65 K
  • Pressure
    3.05E-5
    bar
    3.05 pa 4.4236E-4 lbf/in2 3.0101E-5 Atm 3.05E-3 Kpa 2.2877E-2 mmHg
Pressure 1.013 bar
  • Melting point
    - 141.49
    °C
    - 222.682 °F 131.66 K
  • Latent heat of fusion (at melting point)
    107.168
    kJ/kg
    46.1049 Btu/lb 25.6138 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    735.2
    kg/m³
    45.8969 lb/ft³
  • Boiling point
    - 24.81
    °C
    - 12.658 °F 248.34 K
  • Latent heat of vaporization (at boiling point)
    461.55
    kJ/kg
    198.564 Btu/lb 110.3131 kcal/kg
Pressure1.013barTemperature
  • Compressibility factor Z
    9.7179E-1
    9.7735E-1
    9.8021E-1
  • Cp/Cv ratio γ
    1.1746
    1.164
    1.158
  • Dynamic viscosity
    8.2865E-5
    Po
    8.2865 µPa.s 8.2865E-6 PA.S 5.5683E-6 lb/ft/s
    8.7748E-5
    Po
    8.7748 µPa.s 8.7748E-6 PA.S 5.8964E-6 lb/ft/s
    9.0995E-5
    Po
    9.0995 µPa.s 9.0995E-6 PA.S 6.1146E-6 lb/ft/s
  • Gas density at boiling point
    2.362
    kg/m³
    1.4745E-1 lb/ft³
    2.362
    kg/m³
    1.4745E-1 lb/ft³
    2.362
    kg/m³
    1.4745E-1 lb/ft³
  • Gas density
    2.1145
    kg/m³
    1.32E-1 lb/ft³
    1.993
    kg/m³
    1.2442E-1 lb/ft³
    1.9205
    kg/m³
    1.1989E-1 lb/ft³
  • Heat capacity at constant pressure Cp
    1.4431
    kJ/(kg.K)
    3.4491E-1 BTU/lb∙°F 1443.1 J/kg∙K 3.4491E-1 kcal/kg∙K
    1.4615
    kJ/(kg.K)
    3.4931E-1 BTU/lb∙°F 1461.5 J/kg∙K 3.4931E-1 kcal/kg∙K
    1.4787
    kJ/(kg.K)
    3.5342E-1 BTU/lb∙°F 1478.7 J/kg∙K 3.5342E-1 kcal/kg∙K
  • Heat capacity at constant volume Cv
    1.2285
    kJ/(kg.K)
    2.9362E-1 BTU/lb∙°F 1228.5 J/kg∙K 2.9362E-1 kcal/kg∙K
    1.2556
    kJ/(kg.K)
    3.001E-1 BTU/lb∙°F 1255.6 J/kg∙K 3.001E-1 kcal/kg∙K
    1.2769
    kJ/(kg.K)
    3.0519E-1 BTU/lb∙°F 1276.9 J/kg∙K 3.0519E-1 kcal/kg∙K
  • Liquid (at boiling point)/gas equivalent
    347.69
    mol/mol
    368.89
    mol/mol
    382.82
    mol/mol
  • Solubility in water
    /
    /
    /
  • Specific gravity
    /
    /
    /
  • Specific volume
    4.729E-1
    m³/kg
    7.5751 ft³/lb
    5.018E-1
    m³/kg
    8.0381 ft³/lb
    5.207E-1
    m³/kg
    8.3408 ft³/lb
  • Thermal conductivity
    15.616
    mW/m∙K
    9.0288E-3 Btu/ft/h/°F 1.3436E-1 cal/hour∙cm∙°C 3.7323E-5 cal/s∙cm∙°C 1.5616E-2 W/(m∙K)
    16.999
    mW/m∙K
    9.8284E-3 Btu/ft/h/°F 1.4626E-1 cal/hour∙cm∙°C 4.0629E-5 cal/s∙cm∙°C 1.6999E-2 W/(m∙K)
    17.958
    mW/m∙K
    1.0383E-2 Btu/ft/h/°F 1.5451E-1 cal/hour∙cm∙°C 4.2921E-5 cal/s∙cm∙°C 1.7958E-2 W/(m∙K)
  • Vapor pressure
    2.673
    bar
    2.673E5 pa 38.7686 lbf/in2 2.638 Atm 267.3 Kpa 2004.9204 mmHg
    4.392
    bar
    4.392E5 pa 63.7005 lbf/in2 4.3346 Atm 439.2 Kpa 3294.28 mmHg
    5.928
    bar
    5.928E5 pa 85.9783 lbf/in2 5.8505 Atm 592.8 Kpa 4446.3779 mmHg
(CH3)2O
Dimethylether

Liquid / Gas Volumes

Calculate a liquid or gas volume or a mass

Liquid Phase

At boiling point at 1.013 bar

m3(Volume)
kg(Mass)

Gas Phase

at 1.013 bar and boiling point

m3(Volume)
kg(Mass)
(CH3)2O
Dimethylether

Applications

Examples of uses of this molecule in Industry and Healthcare

Chemicals

Dimethylether is used as solvent in chemical and petrochemical industry.

Chemicals
(CH3)2O
Dimethylether

Safety

Information to safely use this molecule

  • Major hazards
  • Material compatibility
  • GHS02
    Flammable
  • GHS04
    Gas under pressure

Autoignition Temperature in Air at Patm and Flammability Limits in Air at Patm and 293.15 K (except if the temperature is indicated)

  • Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)

    • Auto-ignition temperature
      240
      °C
      464 °F 513.15 K
    • Flash point
      /
    • Lower flammability limit
      2.8
      vol/%
      2.8E4 ppm 2.8E4 ppm 2.8E-2 vol/vol
    • Upper flammability limit (cold environment)
      24.4
      vol/%
      2.44E5 ppm 2.44E5 ppm 2.44E-1 vol/vol
  • US (according to NFPA for Limits and ASTM E659 for autoignition temperature)

    • Auto-ignition temperature
      350
      °C
      662 °F 623.15 K
    • Flash point
      /
    • Lower flammability limit
      3.4
      vol/%
      3.4E4 ppm 3.4E4 ppm 3.4E-2 vol/vol
    • Upper flammability limit (cold environment)
      27
      vol/%
      2.7E5 ppm 2.7E5 ppm 0.27 vol/vol

Threshold of toxicity

  • VME
    /
  • VLE
    /
  • ILV-8h
    1000
    ppm
    or 1920
    mg/m3
  • ILV 15mn
    /
  • TLV-TWA (USA)
    /
  • TLV-STEL (USA)
    /

Odor

Slightly ethereal

Metals

  • Aluminium
    Satisfactory
  • Brass
    Satisfactory
  • Monel
    Satisfactory
  • Copper
    Satisfactory
  • Ferritic Steel
    Satisfactory
  • Stainless steel
    Satisfactory
  • Zinc
    Satisfactory
  • Titanium
    no data

Plastics

  • Polytetrafluoroethylene
    Satisfactory
  • Polychlorotrifluoroethylene
    no data
  • Polyvinylidene fluoride
    Satisfactory
  • Polyvinyl chloride
    Satisfactory
  • Ethylene tetrafluoroethylene
    Satisfactory
  • Polycarbonate
    Not recommended
  • Polyamide
    no data
  • Polypropylene
    no data

Elastomers

  • Buthyl (isobutene- isoprene) rubber
    no data
  • Nitrile rubber
    Satisfactory
  • Chloroprene
    Not recommended
    significant swelling
  • Chlorofluorocarbons
    no data
  • Silicon
    no data
  • Perfluoroelastomers
    Satisfactory
  • Fluoroelastomers
    Satisfactory
  • Nitrile rubber
    Satisfactory
  • Neoprene
    Satisfactory
  • Polyurethane
    no data
  • Ethylene-Propylene
    Satisfactory

Lubricants

  • Hydrocarbon based lubricant
    Not recommended
    significant loss of mass
  • Fluorocarbon based lubricant
    Not recommended
    significant loss of mass

Materials compatibility

Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.

(CH3)2O
Dimethylether

Learn More

General information

More information

Dimethyl ether (DME), also known as methoxymethane, is the organic compound with the formula CH3OCH3, simplified to C2H6O. The simplest ether, it is a colorless gas that is a useful precursor to other organic compounds and an aerosol propellant and is being studied as a future energy option. It is an isomer of ethanol. Unlike other alkyl ethers, dimethyl ether resists autoxidation. Dimethyl ether is also relatively non-toxic, although it is highly flammable.