Ozone Properties

Property	Ozone	Oxygen
Molecular Formula	O3	O2
Molecular Weight	48 g/mol	32 g/mol
Smell	Clothes after being outside on clothesline Photocopy machines Smell after lightning storms	Odorless
Color	Light blue	Colorless
Boilint Point	-111.3 °C (-168.4 °F)	-183 °C (-297.4 °F)
Density	2.141 kg/m3 (0.133 lb/ft3)	1.429 kg/m3
Electrochemical Potential	2.07	1.23
Specific gravity @ STP (air = 1)	1.612	1.105
Solubility in Water (0°C)	190 mg/l	14.6 mg/l
CAS number	10028-15-6	7782-44-7
Odor Threshold	5-20 PPB (0.005 - 0.02 PPM)	Odorless

Ozone Half-Life vs. Temperature

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