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Ozone

Synonyms & Trade Names
Triatomic oxygen
CAS No.
10028-15-6
RTECS No.
RS8225000
DOT ID & Guide
Formula
O3
Conversion
1 ppm = 1.96 mg/m3
IDLH
5 ppm
See: 10028156
Exposure Limits
NIOSH REL
C 0.1 ppm (0.2 mg/m3)
OSHA PEL
TWA 0.1 ppm (0.2 mg/m3) See Appendix G
Measurement Methods
OSHA ID214
See: NMAM or OSHA Methods
Physical Description
Colorless to blue gas with a very pungent odor.
Molecular Weight
48.0
Boiling Point
-169°F
Freezing Point
-315°F
Solubility
(32°F): 0.001%
Vapor Pressure
>1 atm
Ionization Potential
12.52 eV
Flash Point
NA
Upper Exposive Limit
NA
Lower Explosive Limit
NA
Relative Gas Density
1.66
Nonflammable Gas, but a powerful oxidizer.
Incompatibilities & Reactivities
All oxidizable materials (both organic & inorganic)
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
irritation eyes, mucous membrane; pulmonary edema; chronic resp disease
Target Organs
Eyes, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
First Aid
(See procedures)
Eye:Medical attention

Breathing:Fresh air; 100% O2
Respirator Recommendations

NIOSH/OSHA

Up to 1 ppm:
(APF = 10) Any chemical cartridge respirator with cartridge(s) providing protection against the compound of concern¿
(APF = 10) Any supplied-air respirator

Up to 2.5 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern¿

Up to 5 ppm:
(APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern¿
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern¿
(APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern¿
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0068   MEDICAL TESTS: 0172
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