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      Ozone
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      Ozone
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      O3
      Ozone

      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
        47.998
        g/mol
      • Content in dry air
        /

      Critical Point

      • Temperature
        - 12.15
        °C
         10.13 °F 261 K
      • Pressure
        55.7
        bar
         5.57E6 pa 807.8599 lbf/in2 54.9716 Atm 5570 Kpa 4.1779E4 mmHg
      • Density
        539.31
        kg/m³
         33.6679 lb/ft³

      Triple Point

      • Temperature
        - 193
        °C
         - 315.4 °F 80.15 K
      • Pressure
        7.346E-6
        bar
         7.346E-1 pa 1.0654E-4 lbf/in2 7.2499E-6 Atm 7.346E-4 Kpa 5.51E-3 mmHg
      Pressure 1.013 bar
      • Melting point
        - 193
        °C
         - 315.4 °F 80.15 K
      • Latent heat of fusion (at melting point)
        41.668
        kJ/kg
         17.926 Btu/lb 9.9589 kcal/kg
      • Solid density
        /
      Pressure 1.013 bar
      • Liquid density (at boiling point)
        1349.08
        kg/m³
         84.2201 lb/ft³
      • Boiling point
        - 111.3
        °C
         - 168.34 °F 161.85 K
      • Latent heat of vaporization (at boiling point)
        288.49
        kJ/kg
         124.1116 Btu/lb 68.9508 kcal/kg
      Pressure1.013barTemperature
      • Compressibility factor Z
        /
        /
        /
      • Cp/Cv ratio γ
        /
        /
        /
      • Dynamic viscosity
        1.3923E-4
        Po
         13.9228 µPa.s 1.3923E-5 PA.S 9.3557E-6 lb/ft/s
        1.4569E-4
        Po
         14.5685 µPa.s 1.4569E-5 PA.S 9.7896E-6 lb/ft/s
        1.4996E-4
        Po
         14.9961 µPa.s 1.4996E-5 PA.S 1.0077E-5 lb/ft/s
      • Gas density at boiling point
        /
        /
        /
      • Gas density
        2.154
        kg/m³
         1.3447E-1 lb/ft³
        2.154
        kg/m³
         1.3447E-1 lb/ft³
        2.154
        kg/m³
         1.3447E-1 lb/ft³
      • Heat capacity at constant pressure Cp
        /
        /
        /
      • Heat capacity at constant volume Cv
        /
        /
        /
      • Liquid (at boiling point)/gas equivalent
        626.31
        mol/mol
        626.31
        mol/mol
        626.31
        mol/mol
      • Solubility in water
        /
        /
        /
      • Specific gravity
        /
        /
        /
      • Specific volume
        /
        /
        /
      • Thermal conductivity
        17.889
        mW/m∙K
         1.0343E-2 Btu/ft/h/°F 1.5392E-1 cal/hour∙cm∙°C 4.2756E-5 cal/s∙cm∙°C 1.7889E-2 W/(m∙K)
        19.068
        mW/m∙K
         1.1025E-2 Btu/ft/h/°F 1.6407E-1 cal/hour∙cm∙°C 4.5574E-5 cal/s∙cm∙°C 1.9068E-2 W/(m∙K)
        19.854
        mW/m∙K
         1.1479E-2 Btu/ft/h/°F 1.7083E-1 cal/hour∙cm∙°C 4.7452E-5 cal/s∙cm∙°C 1.9854E-2 W/(m∙K)
      • Vapor pressure
        /
        /
        /
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      O3
      Ozone

      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)
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      O3
      Ozone

      Applications

      Examples of uses of this molecule in Industry and Healthcare

      Food

      Ozone allows to disinfect water used for fish farming, food manufacturing and sanitation.

      Food

      Other

      Ozonated water is used to sanitize surfaces and disinfect products. Ozone is also used for swimming pools, spa, laundry, odor control, etc.

      Waste & Water management

      Ozone is used to decrease Chemical Oxygen Demand (COD) of waste water. Ozone permits to obtain good decolorization of waste water effluents.

      Waste & Water management

      Pulp & Paper

      Ozone allows environment-friendly paper pulp bleaching. Ozone is used to reduce the residual fluorescence coming from the optical whiteners of the waste papers. It is also used to treat specific effluents.

      Pharma & Biotech

      Ozone is used in chemical synthesis and for treatment of wastewater.

      Pharma & Biotech

      Electronic components

      Ozone is used to oxidize materials such as silicon to silicon dioxide. It is also used to ash photoresists. Ozone allows to achieve Chemical Vapor Deposition (CVD) of oxides.

      Electronic components
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      O3
      Ozone

      Safety & Compatibility

      Information to safely use this molecule

      • Major hazards
      • Material compatibility
      Safety
      • GHS03
        Oxidising
      • GHS05
        Corrosive
      • GHS06
        Acute Toxicity

      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 NBR
        No data
      • Chloroprene
        No data
      • Silicon
        No data
      • Perfluoroelastomers
        No data
      • Fluoroelastomers
        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.

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      O3
      Ozone

      Learn More

      General information

      More information

      Ozone was discovered in 1789 by Martin van Marum, however Christian Friedrich Schönbein is considered as the father of ozone. Its name comes from the Greek word "ozein", meaning "smell". Ozone is formed by the combination of three oxygen atoms. Ozone is an unstable gas with a strong and irritating odor (which explains its name), corrosive, very toxic and a strong oxidant. Ozone is generally produced by generating high-power electrical discharges in air or in oxygen. Naturally found in the upper layers of the atmosphere, where it is formed by a photo-chemical reaction, ozone serves as a shield which protects our planet from the sun's ultraviolet radiation.

      O3

      Ozone