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Phosphine

Synonyms & Trade Names
Hydrogen phosphide, Phosphorated hydrogen, Phosphorus hydride, Phosphorus trihydride
CAS No.
7803-51-2
RTECS No.
SY7525000
DOT ID & Guide
2199 119
Formula
PH3
Conversion
1 ppm = 1.39 mg/m3
IDLH
50 ppm
See: 7803512
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) See Appendix G
Measurement Methods
NIOSH 6002;
OSHA 1003 , ID180
See: NMAM or OSHA Methods
Physical Description
Colorless gas with a fish- or garlic-like odor. [pesticide] [Note: Shipped as a liquefied compressed gas. Pure compound is odorless.]
Molecular Weight
34.0
Boiling Point
-126°F
Freezing Point
-209°F
Solubility
Slight
Vapor Pressure
41.3 atm
Ionization Potential
9.96 eV
Flash Point
NA (Gas)
Upper Exposive Limit
?
Lower Explosive Limit
1.79%
Relative Gas Density
1.18
Flammable Gas
Incompatibilities & Reactivities
Air, oxidizers, chlorine, acids, moisture, halogenated hydrocarbons, copper [Note: May ignite SPONTANEOUSLY on contact with air.]
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
Personal Protection/Sanitation
(See protection codes)
Skin:Frostbite
Eyes:Frostbite
Wash skin:No recommendation
Remove:When wet (flammable)
Change:No recommendation
Provide:Frostbite wash
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

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0694   MEDICAL TESTS: 0187
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