Phosphine
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CAS
7803-51-2
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PH3
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RTECS
SY7525000
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Synonyms & Trade Names
Hydrogen phosphide, Phosphorated hydrogen, Phosphorus hydride, Phosphorus trihydride
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DOT ID & Guide
2199 / 119
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Exposure
Limits
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NIOSH REL: TWA 0.3 ppm (0.4 mg/m3) ST 1 ppm (1 mg/m3)
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OSHA PEL†: TWA 0.3 ppm (0.4 mg/m3)
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IDLH
50 ppm
See: 7803512
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Conversion
1 ppm = 1.39 mg/m3
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Physical Description
Colorless gas with a fish- or garlic-like odor. [pesticide] [Note: Shipped as a liquefied compressed gas. Pure compound is odorless.]
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MW: 34.0
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BP: -126°F
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FRZ: -209°F
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Sol: Slight
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VP: 41.3 atm
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IP: 9.96 eV
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RGasD: 1.18
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Fl.P: NA (Gas)
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UEL: ?
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LEL: 1.79%
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Flammable Gas
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Incompatibilities & Reactivities
Air, oxidizers, chlorine, acids, moisture, halogenated hydrocarbons, copper [Note: May ignite SPONTANEOUSLY on contact with air.]
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Measurement Methods
OSHA 1003, ID180
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite wash
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First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
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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
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Exposure Routes
inhalation, skin and/or eye contact (liquid)
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Symptoms
Nausea, vomiting, abdominal pain, diarrhea; thirst; chest tightness, dyspnea (breathing difficulty); muscle pain, chills; stupor or syncope; pulmonary edema; liquid: frostbite
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Target Organs
respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0694 See MEDICAL TESTS: 0187
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