What is Ozone?
Discovered by Christian Friedrich Schonbein in 1840, Ozone is triatomic oxygen with the
chemical formula O3. It derives its name from the Greek word ozein or ogeiv, “to smell or smell.”
Ozone gas is light blue at room temperature and has a characteristic pungent odor. Physical
property data is provided in the table below:
Discovered by Christian Friedrich Schonbein in 1840, Ozone is triatomic oxygen with the
chemical formula O3. It derives its name from the Greek word ozein or ogeiv, “to smell or smell.”
Ozone gas is light blue at room temperature and has a characteristic pungent odor. Physical
property data is provided in the table below:
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At standard temperature and pressure ozone is a blue gas. Ozone forms a dark blue liquid below -112 °C and a dark blue
solid below -193 °C. Ozone is a powerful oxidizing agent, and is unstable, decaying to ordinary oxygen through the
reaction: 2O3 → 3O2.
solid below -193 °C. Ozone is a powerful oxidizing agent, and is unstable, decaying to ordinary oxygen through the
reaction: 2O3 → 3O2.
Typical Ozone Lifetime as a Function of Temperature
Gaseous Dissolved in Water (pH 7)
Half Life Time Temperature Half Life Time Temperature
3 months -50 C 30 minutes 15 C
18 days -35 C 20 minutes 20 C
8 days -25 C 15 minutes 25 C
3 days 20 C 12 minutes 30 C
1.5 hours 120 C 8 minutes 35 C
1.5 seconds 250 C
Values based on thermal decomposition only, does not consider chemical reactions, wall and catalytic effects.
Note: According to Henry's Law, the solubility of a gas in a liquid is related to the concentration of that gas in the gas phase. Ozone is typically produced at a
concentration of 2.5 to 10 wt % in air or oxygen. The figures above are based on theoretical considerations for pure water and adjusting the value to reflect the
lower gas concentration. As shown in the chart above, ozone solubility decreases with increasing water temperature.
Gaseous Dissolved in Water (pH 7)
Half Life Time Temperature Half Life Time Temperature
3 months -50 C 30 minutes 15 C
18 days -35 C 20 minutes 20 C
8 days -25 C 15 minutes 25 C
3 days 20 C 12 minutes 30 C
1.5 hours 120 C 8 minutes 35 C
1.5 seconds 250 C
Values based on thermal decomposition only, does not consider chemical reactions, wall and catalytic effects.
- Approximate Solubility of Ozone in Water
- As a Function of Temperature and Ozone Gas Concentration
Note: According to Henry's Law, the solubility of a gas in a liquid is related to the concentration of that gas in the gas phase. Ozone is typically produced at a
concentration of 2.5 to 10 wt % in air or oxygen. The figures above are based on theoretical considerations for pure water and adjusting the value to reflect the
lower gas concentration. As shown in the chart above, ozone solubility decreases with increasing water temperature.
Spartan Environmental Technologies
Air and Water Treatment
Air and Water Treatment
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Phone: 800-492-1252
Fax: 440-368-3569
E-mail: info@
spartanwatertreatment.com
What is Ozone and What are its Properties
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