# NIOSH Pocket Guide to Chemical Hazards
Hydrogen peroxide | CAS 7722-84-1
H2O2 | RTECS MX0900000
Synonyms & Trade Names High-strength hydrogen peroxide, Hydrogen dioxide, Hydrogen peroxide (aqueous), Hydroperoxide, Peroxide | DOT ID & Guide 2984 140 (8-20% solution) 2014 140 (20-60% solution) 2015 143 (>60% solution)
Exposure Limits | NIOSH REL: TWA 1 ppm (1.4 mg/m3)
OSHA PEL: TWA 1 ppm (1.4 mg/m3)
IDLH 75 ppm | Conversion 1 ppm = 1.39 mg/m3
Physical Description Colorless liquid with a slightly sharp odor. [Note: The pure compound is a crystalline solid below 12°F. Often used in an aqueous solution.]
MW: 34.0 | BP: 286°F | FRZ: 12°F | Sol: Miscible
VP(86°F): 5 mmHg | IP: 10.54 eV |  | Sp.Gr: 1.39
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Liquid, but a powerful oxidizer.
Incompatibilities & Reactivities Oxidizable materials, iron, copper, brass, bronze, chromium, zinc, lead, silver, manganese. [Note: Contact with combustible material may result in SPONTANEOUS combustion.]
Measurement Methods OSHA ID126SG
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA Up to 10 ppm: (APF = 10) Any supplied-air respirator* Up to 25 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode* Up to 50 ppm: (APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece Up to 75 ppm: (APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode 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, ingestion, skin and/or eye contact
Symptoms Irritation eyes, nose, throat; corneal ulcer; erythema (skin redness), skin vesiculation; bleaching hair
Target Organs Eyes, skin, respiratory system
See also: INTRODUCTION