NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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 See: 10028156
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
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
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   See ICSC CARD: 0068   See MEDICAL TESTS: 0172