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n-Heptane
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n-Heptane
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C7H16
n-Heptane

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
    100.202
    g/mol
  • Content in air
    /

Critical Point

  • Temperature
    266.98
    °C
    512.564 °F 540.13 K
  • Pressure
    27.36
    bar
    2.736E6 pa 396.8231 lbf/in2 27.0022 Atm 2736 Kpa 2.0522E4 mmHg
  • Density
    231.998
    kg/m³
    14.4831 lb/ft³

Triple Point

  • Temperature
    - 90.6
    °C
    - 131.08 °F 182.55 K
  • Pressure
    1.827E-6
    bar
    1.827E-1 pa 2.6498E-5 lbf/in2 1.8031E-6 Atm 1.827E-4 Kpa 1.3704E-3 mmHg
Pressure 1.013 bar
  • Melting point
    - 90.58
    °C
    - 131.044 °F 182.57 K
  • Latent heat of fusion (at melting point)
    140.217
    kJ/kg
    60.3229 Btu/lb 33.5127 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    614.219
    kg/m³
    38.3444 lb/ft³
  • Boiling point
    98.38
    °C
    209.084 °F 371.53 K
  • Latent heat of vaporization (at boiling point)
    316.887
    kJ/kg
    136.3283 Btu/lb 75.7378 kcal/kg
Pressure1.013barTemperature
  • Compressibility factor Z
    /
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  • Cp/Cv ratio γ
    /
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  • Dynamic viscosity
    /
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  • Gas density at boiling point
    3.471
    kg/m³
    2.1669E-1 lb/ft³
    3.471
    kg/m³
    2.1669E-1 lb/ft³
    3.471
    kg/m³
    2.1669E-1 lb/ft³
  • Gas density
    /
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  • Heat capacity at constant pressure Cp
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  • Heat capacity at constant volume Cv
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  • Liquid (at boiling point)/gas equivalent
    /
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  • Solubility in water
    /
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  • Specific gravity
    /
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  • Specific volume
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  • Thermal conductivity
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  • Vapor pressure
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C7H16
n-Heptane

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)
C7H16
n-Heptane

Applications

Examples of uses of this molecule in Industry and Healthcare

C7H16
n-Heptane

Safety

Information to safely use this molecule

  • Major hazards
  • Material compatibility
  • GHS02
    Flammable
  • GHS08
    Serious health hazard
  • GHS09
    Hazardous to the environment

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
      220
      °C
      428 °F 493.15 K
    • Flash point
      /
    • Lower flammability limit
      0.84
      vol/%
      8400 ppm 8400 ppm 8.4E-3 vol/vol
    • Upper flammability limit
      6.7
      vol/%
      6.7E4 ppm 6.7E4 ppm 6.7E-2 vol/vol
  • US (according to NFPA for Limits and ASTM E659 for autoignition temperature)

    • Auto-ignition temperature
      204
      °C
      399.2 °F 477.15 K
    • Flash point
      /
    • Lower flammability limit
      1.05
      vol/%
      1.05E4 ppm 1.05E4 ppm 1.05E-2 vol/vol
    • Upper flammability limit
      6.7
      vol/%
      6.7E4 ppm 6.7E4 ppm 6.7E-2 vol/vol

Threshold of toxicity

  • VME
    /
  • VLE
    500
    ppm
    or 2085
    mg/m3
  • ILV-8h
    /
  • ILV 15mn
    /
  • TLV-TWA (USA)
    400
    ppm
    400 ppm 0.04 vol/% 4.E-4 vol/vol
  • TLV-STEL (USA)
    500
    ppm
    500 ppm 0.05 vol/% 5.E-4 vol/vol

Odor

Gasoline

Metals

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

Plastics

  • Polytetrafluoroethylene
    no data
  • Polychlorotrifluoroethylene
    no data
  • Polyvinylidene fluoride
    no data
  • Polyvinyl chloride
    no data
  • Ethylene tetrafluoroethylene
    no data
  • Polycarbonate
    no data
  • Polyamide
    no data
  • Polypropylene
    no data

Elastomers

  • Buthyl (isobutene- isoprene) rubber
    no data
  • Nitrile rubber
    no data
  • Chloroprene
    no data
  • Chlorofluorocarbons
    no data
  • Silicon
    no data
  • Perfluoroelastomers
    no data
  • Fluoroelastomers
    no data
  • Nitrile rubber
    no data
  • Neoprene
    no data
  • Polyurethane
    no data
  • Ethylene-Propylene
    no data

Lubricants

  • Hydrocarbon based lubricant
    no data
  • Fluorocarbon based lubricant
    no data

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.

C7H16
n-Heptane

Learn More

General information

More information

Heptane is one of the 9 isomers C7H16 or a derivative of these molecules that comprises 7 atoms of carbon. In greek, "ἑπτά" (epta) means "seven".