Ozone Properties

28th Sep 2021

Ozone and Oxygen Properties

Ozone is one of the most powerful oxidants used in water and air applications. See the different properties of ozone below: 

PROPERTY OZONE OXYGEN
Molecular Weight 48 32
Color Light Blue Colorless
Smell Smell after Lightning Storm Odorless
Solubility in Water (0° C) 0.640 0.049
Density (g/l) 2.144 1.429
Electochemical Potential (volts) 2.070 1.230

Typical O3 Half-Life vs. Temperature

GASEOUS TEMP (° C) GASEOUS HALF-LIFE* DISSOLVED TEMP (° C) DISSOLVED HALF-LIFE
-50 3 Months 15 30 Minutes
-35 18 Days 20 20 Minutes
-25 8 Days 25 15 Minutes
20 3 Days 30 12 Minutes
120 1.5 Hours 35 8 Minutes
250 1.5 Seconds    

* These values are based on thermal decomposition only. No wall effects, humidity, organic loading or other catalytic effects are considered. 

Ozone Solubility

The solubility of ozone depends on the water temperature and the ozone concentration in the gas phase: Units in g/m^3. 

OZONE GAS 0° C 5° C 10° C 15° C 20° C 25° C 30° C 35° C
25 g/m^3 16.00 12.50 9.75 7.75 6.00 4.75 3.75 3.00
50 g/m^3 32.00 25.00 19.50 15.50 12.00 9.50 7.50 6.00
75 g/m^3 48.00 37.50 29.25 23.25 18.00 14.25 11.25 9.00
100 g/m^3 64.00 50.00 39.00 31.00 24.00 19.00 15.00 12.00
125 g/m^3 80.00 62.50 48.75 38.75 30.00 23.75 18.75 15.00
150 g/m^3 96.00 75.00 58.50 46.50 36.00 28.50 22.50 18.75
175 g/m^3 112.00 87.50 68.25 45.25 42.00 33.25 26.25 21.00
200 g/m^3 128.00 100.00 78.00 62.00 48.00 38.00 30.00 24.00

Note: 14.3 g/m3 = 1% ozone

Example: 50 g/m3 = 3.5% ozone