Ozone

O₃
CAS Number 10028-15-6

Molecule
Properties
Applications
Safety & Compatibility
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Liquid / Gas Volumes

Calculate the volume or mass of a quantity of gas or liquid

Liquid Phase

At boiling point at 1.013 bar

m³ (Volume)

kg (Mass)

Gas Phase

In standard conditions (1.013 bar, 15°C)

m³ (Volume)

kg (Mass)

Physical Properties

Download the set of data (XLS - 71.51 KB)

General Properties
Solid Phase
Liquid Phase
Gas Phase

Molecule phase diagram showing the transition phases between solid, liquid and gas as a function of temperature and pressure

Pressure (bar)

- Molar mass 47.998 g/mol
- Content in dry air /
Critical Point
- Temperature -12.15 °C
- Pressure 55.7 bar
- Density 539.31 kg/m³
Triple Point
- Temperature -193.00 °C
- Pressure 7.346E-6 bar

Pressure 1.013 bar

Latent heat of fusion (at melting point)	41.668 kJ/kg
Melting point	- 193 °C

Pressure 1.013 bar

Boiling point	- 111.3 °C
Latent heat of vaporization (at boiling point)	288.49 kJ/kg
Liquid density (at boiling point)	1349.08 kg/m³

Pressure 1.013 bar

0 °C
15 °C
25 °C

Gas/(liquid at boiling point) equivalent	626.31 vol/vol
Thermal conductivity	17.889 mW/(m.K)
Viscosity	1.3923E-4 Po

Gas/(liquid at boiling point) equivalent	626.31 vol/vol
Thermal conductivity	19.068 mW/(m.K)
Viscosity	1.4569E-4 Po

Gas/(liquid at boiling point) equivalent	626.31 vol/vol
Thermal conductivity	19.854 mW/(m.K)
Viscosity	1.4996E-4 Po

Applications

Examples of uses of this molecule in Industry and Healthcare

Electronic components

Ozone is used in (PE)ALD (Plasma Enhanced Atomic Layer Deposition) processes as an oxidant to deposit oxides. Ozone is used in some wafer cleaning steps.

Waste & Water management

Ozone is used in water management to decompose strong pollutants (through oxidation), to reduce effluent odors and color contaminants. Ozone can also be used for bleaching and is a sustainable alternative to chlore products as biocide.

Food

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

Other

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

Pharma & Biotech

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

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.

Safety & Compatibility

Major Hazards
Material Compatibility

GHS03

Oxidising

GHS05

Corrosive

GHS06

Acute Toxicity

Threshold of toxicity

PEL USA OSHA (vol)	0.1 ppm
VLEP 8h France (at Patm and 293.15 K)	0.2 mg/m³ or 0.1 ppm
VLEP CT France (at Patm and 293.15 K)	0.4 mg/m³ or 0.2 ppm

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

Butyl (isobutene- isoprene) rubber	No data
Nitrile rubber	No data
Chloroprene	No data
Chlorofluorocarbons	No data
Silicone	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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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.