# NIOSH Pocket Guide to Chemical Hazards
Ozone | CAS 10028-15-6
O3 | RTECS RS8225000
Synonyms & Trade Names Triatomic oxygen | DOT ID & Guide
Exposure Limits | NIOSH REL: C 0.1 ppm (0.2 mg/m3)
OSHA PEL†: TWA 0.1 ppm (0.2 mg/m3)
IDLH 5 ppm | Conversion 1 ppm = 1.96 mg/m3
Physical Description Colorless to blue gas with a very pungent odor.
MW: 48.0 | BP: -169°F | FRZ: -315°F | Sol(32°F): 0.001%
VP: >1 atm | IP: 12.52 eV | RGasD: 1.66 |
Fl.P: NA | UEL: NA | LEL: NA |
Nonflammable Gas, but a powerful oxidizer.
Incompatibilities & Reactivities All oxidizable materials (both organic & inorganic)
Measurement Methods OSHA ID214
Personal Protection & Sanitation 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
Exposure Routes inhalation, skin and/or eye contact
Symptoms Irritation eyes, mucous membrane; pulmonary edema; chronic respiratory disease
Target Organs Eyes, respiratory system
See also: INTRODUCTION