NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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 See: 7803512
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
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
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
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   See ICSC CARD: 0694   See MEDICAL TESTS: 0187