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Phosphine																				Related Pages
Synonyms & Trade Names
			Hydrogen phosphide, Phosphorated hydrogen, Phosphorus hydride, Phosphorus trihydride
CAS No.
			7803-51-2
	RTECS No.
			SY7525000
	DOT ID & Guide
			2199 119

FormulaPH3
	Conversion
			1 ppm = 1.39 mg/m3
	IDLH
			50 ppmSee: 7803512

Exposure Limits
			NIOSH RELTWA 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 Weight34.0	
	Boiling Point-126°F
	Freezing Point-209°F
	SolubilitySlight
	Vapor Pressure41.3 atm
	Ionization Potential9.96 eV											
Flash PointNA (Gas)
	Upper Explosive Limit?
	Lower Explosive Limit1.79%
	Relative Gas Density1.18
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 concernAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0694
					  MEDICAL TESTS: 0187

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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