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Nitric oxide
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Nitric oxide
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NO
Nitric oxide

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
    30.006
    g/mol
  • Content in air
    3.477E-2
    ppm
    3.477E-2 ppm 3.477E-6 vol/% 3.477E-8 vol/vol

Critical Point

  • Temperature
    - 93
    °C
    - 135.4 °F 180.15 K
  • Pressure
    64.8
    bar
    6.48E6 pa 939.8442 lbf/in2 63.9526 Atm 6480 Kpa 4.8604E4 mmHg
  • Density
    517.345
    kg/m³
    32.2967 lb/ft³

Triple Point

  • Temperature
    - 163.65
    °C
    - 262.57 °F 109.5 K
  • Pressure
    2.189E-1
    bar
    2.189E4 pa 3.1749 lbf/in2 2.1604E-1 Atm 21.89 Kpa 164.189 mmHg
Pressure 1.013 bar
  • Melting point
    - 161
    °C
    - 257.8 °F 112.15 K
  • Latent heat of fusion (at melting point)
    76.684
    kJ/kg
    32.9903 Btu/lb 18.3279 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    1280.84
    kg/m³
    79.96 lb/ft³
  • Boiling point
    - 151.77
    °C
    - 241.186 °F 121.38 K
  • Latent heat of vaporization (at boiling point)
    450.877
    kJ/kg
    193.9723 Btu/lb 107.7622 kcal/kg
Pressure1.013barTemperature
  • Compressibility factor Z
    /
    /
    /
  • Cp/Cv ratio γ
    /
    /
    /
  • Dynamic viscosity
    1.7804E-4
    Po
    17.804 µPa.s 1.7804E-5 PA.S 1.1964E-5 lb/ft/s
    1.8603E-4
    Po
    18.603 µPa.s 1.8603E-5 PA.S 1.2501E-5 lb/ft/s
    1.9126E-4
    Po
    19.1255 µPa.s 1.9126E-5 PA.S 1.2852E-5 lb/ft/s
  • Gas density at boiling point
    /
    /
    /
  • Gas density
    1.3402
    kg/m³
    8.3666E-2 lb/ft³
    1.3402
    kg/m³
    8.3666E-2 lb/ft³
    1.3402
    kg/m³
    8.3666E-2 lb/ft³
  • Heat capacity at constant pressure Cp
    /
    /
    /
  • Heat capacity at constant volume Cv
    /
    /
    /
  • Liquid (at boiling point)/gas equivalent
    955.71
    mol/mol
    955.71
    mol/mol
    955.71
    mol/mol
  • Solubility in water
    /
    4.163E-5
    mol/mol
    3.477E-5
    mol/mol
  • Specific gravity
    1.04
    1.04
    1.04
  • Specific volume
    /
    /
    /
  • Thermal conductivity
    23.703
    mW/m∙K
    1.3704E-2 Btu/ft/h/°F 2.0395E-1 cal/hour∙cm∙°C 5.6652E-5 cal/s∙cm∙°C 2.3703E-2 W/(m∙K)
    24.859
    mW/m∙K
    1.4373E-2 Btu/ft/h/°F 2.1389E-1 cal/hour∙cm∙°C 5.9414E-5 cal/s∙cm∙°C 2.4859E-2 W/(m∙K)
    25.622
    mW/m∙K
    1.4814E-2 Btu/ft/h/°F 2.2046E-1 cal/hour∙cm∙°C 6.1238E-5 cal/s∙cm∙°C 2.5622E-2 W/(m∙K)
  • Vapor pressure
    /
    /
    /
NO
Nitric oxide

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)
NO
Nitric oxide

Applications

Examples of uses of this molecule in Industry and Healthcare

Laboratories & Research Centers

Nitric oxide is used in calibration gas mixtures for petrochemical industry, environmental emission monitoring, industrial hygiene monitors and trace impurity analyzers.

Laboratories & Research Centers

Hospital care

Nitric oxide is used as vaso dilator for pulmonary arterial hypertension, as well as for lung function test.

Hospital care
NO
Nitric oxide

Safety

Information to safely use this molecule

  • Major hazards
  • Material compatibility
  • GHS03
    Oxidising
  • GHS04
    Gas under pressure
  • GHS05
    Corrosive
  • GHS06
    Acute Toxicity

Threshold of toxicity

  • VME
    25
    ppm
    or 30
    mg/m3
  • VLE
    /
  • ILV-8h
    /
  • ILV 15mn
    /
  • TLV-TWA (USA)
    25
    ppm
    25 ppm 2.5E-3 vol/% 2.5E-5 vol/vol
  • TLV-STEL (USA)
    /

Odor

Slightly irritating

Metals

  • Aluminium
    Satisfactory
  • Brass
    Not recommended
  • Monel
    Satisfactory
  • Copper
    Satisfactory
  • Ferritic Steel
    Satisfactory
  • Stainless steel
    Satisfactory
  • Zinc
    no data
  • Titanium
    no data

Plastics

  • Polytetrafluoroethylene
    Satisfactory
    risk of release of toxic vapor in extreme conditions (elevated temperature)
  • Polychlorotrifluoroethylene
    Satisfactory
    risk of release of toxic vapor in extreme conditions (elevated temperature)
  • Polyvinylidene fluoride
    Satisfactory
    risk of release of toxic vapor in extreme conditions (elevated temperature)
  • Polyvinyl chloride
    Satisfactory
  • Ethylene tetrafluoroethylene
    Satisfactory
  • Polycarbonate
    no data
  • Polyamide
    Not recommended
    significant loss of mass
  • Polypropylene
    Not recommended
    significant loss of mass; risk of explosion and fire

Elastomers

  • Buthyl (isobutene- isoprene) rubber
    Not recommended
    significant loss of mass; risk of explosion and fire
  • Nitrile rubber
    Not recommended
    significant loss of mass; risk of explosion and fire
  • Chloroprene
    Not recommended
    significant loss of mass; risk of explosion and fire
  • Chlorofluorocarbons
    Satisfactory
    risk of release of toxic vapor in extreme conditions (elevated temperature)
  • Silicon
    Not recommended
    risk of explosion and fire
  • Perfluoroelastomers
    Satisfactory
  • Fluoroelastomers
    no data
  • Nitrile rubber
    no data
  • Neoprene
    Satisfactory
  • Polyurethane
    no data
  • Ethylene-Propylene
    Not recommended
    significant loss of mass; risk of explosion and fire

Lubricants

  • Hydrocarbon based lubricant
    Not recommended
    contamination of the material; risk of explosion and fire
  • Fluorocarbon based lubricant
    Not recommended
    contamination of the material

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.

NO
Nitric oxide

Learn More

General information

More information

Nitric oxide is a major air pollutant, mainly rejected by premises heating systems, cars, thermal power plants and incineration plants.