E2648-O3
Rev 22.06.2021
Ozone
Toxic Colourless gas with a characteristic pungent smell. Ozone is formed from oxygen by
the action of UV light or electric discharge.
Ozone is a strong oxidant and is mostly used as a disinfecting and sterilizing agent.
Chemical formula
O
3
Molar weight
48
Conversion
1 ppm = 1.96 mg/m
3
Relative gas density (to air)
1.50
Boiling point
−112 °C
Odor
Characteristic pungent irritant odor
Odor threshold
100 ppb
Hazards
The powerful oxidizer can cause flammable substances
to ignite.
Ozone can harm lung function and irritate the respiratory
system. Exposure to ozone (and the pollutants that
produce it) is linked to premature death, asthma,
bronchitis, heart attack, and other cardiopulmonary
problems.
Exposure limits
(NIOSH)
TWA
0.2 mg/mm
3
/ 0.1 ppm
IDLH (NIOSH)
9.8 mg/mm
3
/ 5 ppm
Conversion of ppm to mg/m
3
is calculated for 25°C and 1 atm.
3
