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Ozone Properties:

Property Ozone vs. Oxygen
Molecular Formula: O3 O2
Molecular Weight: 48 32
Color: light blue colorless
Smell: - clothes after being outside on clothesline
- photocopy machines
- smell after lightning storms
- odorless
Solubility in Water (@ O-deg C): 0.64 0.049
Density (g/l): 2.144 1.429
Electrochemical Potential, V: 2.07 1.23

 

Typical O3 half-life vs. Temperature

Gaseous

Temp (C)

half-life *

-50

3-months

-35

18-days

-25

8-days

20

3-days

120

1.5-hours

250

1.5- seconds

Dissolved in Water (pH 7)
Temp (C) half-life
15 30-minutes
20 20-minutes
25 15-minutes
30 12-minutes
35 8-minutes

*
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 mg/l or ppm.

 

O3 GAS

5o C

10o C

15o C

20o C

1.5%

11.09

9.75

8.40

6.43

2%

14.79

13.00

11.19

8.57

3%

22.18

19.50

16.79

12.86

  Solubility of Ozone in Water Chart

 

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