NIOSH Pocket Guide to Chemical Hazards

Phosphine CAS 7803-51-2
PH3 RTECS SY7525000
Synonyms & Trade Names
Hydrogen phosphide, Phosphorated hydrogen, Phosphorus hydride, Phosphorus trihydride
DOT ID & Guide
2199 119
Exposure
Limits
NIOSH REL: TWA 0.3 ppm (0.4 mg/m3) ST 1 ppm (1 mg/m3)
OSHA PEL�: TWA 0.3 ppm (0.4 mg/m3)
IDLH 50 ppm Conversion 1 ppm = 1.39 mg/m3
Physical Description
Colorless gas with a fish- or garlic-like odor. [pesticide] [Note: Shipped as a liquefied compressed gas. Pure compound is odorless.]
MW: 34.0
BP: -126°F
FRZ: -209°F
Sol: Slight
VP: 41.3 atm
IP: 9.96 eV
RGasD: 1.18

Fl.P: NA (Gas)
UEL: ?
LEL: 1.79%

Flammable Gas
Incompatibilities & Reactivities
Air, oxidizers, chlorine, acids, moisture, halogenated hydrocarbons, copper [Note: May ignite SPONTANEOUSLY on contact with air.]
Measurement Methods
OSHA 1003, ID180
Personal Protection & Sanitation
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite
First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support

Respirator Recommendations NIOSH/OSHA
Up to 3 ppm: (APF = 10) Any supplied-air respirator
Up to 7.5 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 15 ppm: (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 self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece
Up to 50 ppm: (APF = 1000) Any supplied-air respirator 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, skin and/or eye contact (liquid)
Symptoms Nausea, vomiting, abdominal pain, diarrhea; thirst; chest tightness, dyspnea (breathing difficulty); muscle pain, chills; stupor or syncope; pulmonary edema; liquid: frostbite
Target Organs respiratory system
See also: INTRODUCTION