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Water
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Water
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H2O
Water

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
    18.015
    g/mol
  • Content in air
    /

Critical Point

  • Temperature
    373.95
    °C
    705.11 °F 647.1 K
  • Pressure
    220.64
    bar
    2.2064E7 pa 3200.1114 lbf/in2 217.7547 Atm 2.2064E4 Kpa 1.6549E5 mmHg
  • Density
    322
    kg/m³
    20.1018 lb/ft³

Triple Point

  • Temperature
    0.01
    °C
    32.018 °F 273.16 K
  • Pressure
    6.117E-3
    bar
    611.7 pa 8.872E-2 lbf/in2 6.037E-3 Atm 6.117E-1 Kpa 4.5881 mmHg
Pressure 1.013 bar
  • Melting point
    /
  • Latent heat of fusion (at melting point)
    333.15
    kJ/kg
    143.3248 Btu/lb 79.6248 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    958.37
    kg/m³
    59.8289 lb/ft³
  • Boiling point
    99.97
    °C
    211.946 °F 373.12 K
  • Latent heat of vaporization (at boiling point)
    2256.5
    kJ/kg
    970.7715 Btu/lb 539.3164 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
    5.98E-1
    kg/m³
    3.7332E-2 lb/ft³
    5.98E-1
    kg/m³
    3.7332E-2 lb/ft³
    5.98E-1
    kg/m³
    3.7332E-2 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
    6.1E-3
    bar
    610 pa 8.8473E-2 lbf/in2 6.0202E-3 Atm 0.61 Kpa 4.5754 mmHg
    1.71E-2
    bar
    1710 pa 2.4801E-1 lbf/in2 1.6876E-2 Atm 1.71 Kpa 12.8261 mmHg
    3.17E-2
    bar
    3170 pa 4.5977E-1 lbf/in2 3.1285E-2 Atm 3.17 Kpa 23.777 mmHg
H2O
Water

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)
H2O
Water

Applications

Examples of uses of this molecule in Industry and Healthcare

H2O
Water

Safety

Information to safely use this molecule

  • Material compatibility

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.

H2O
Water

Learn More

General information

More information

Water covers 71 % of the Earth's surface.