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Phosphorus trichloride																				Related Pages
Synonyms & Trade Names
			Phosphorus chloride [Phosphorus trichloride]
CAS No.
			7719-12-2
	RTECS No.
			TH3675000
	DOT ID & Guide
			1809 137

FormulaPCl3
	Conversion
			1 ppm = 5.62 mg/m3
	IDLH
			25 ppmSee: 7719122

Exposure Limits
			NIOSH RELTWA 0.2 ppm (1.5 mg/m3) ST 0.5 ppm (3 mg/m3)
					OSHA PEL TWA 0.5 ppm (3 mg/m3) See Appendix G
	Measurement Methods
			**NIOSH** 6402
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless to yellow, fuming liquid with an odor like hydrochloric acid.													
										
Molecular Weight137.4	
	Boiling Point169°F
	Freezing Point-170°F
	SolubilityReacts
	Vapor Pressure100 mmHg
	Ionization Potential9.91 eV											
Specific Gravity1.58	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
Noncombustible Liquid; however, a strong oxidizer that may ignite combustibles upon contact.
Incompatibilities & Reactivities
			Water, chemically-active metals such as sodium & potassium, aluminum, strong nitric acid, acetic acid, organic matter
					[Note: Hydrolyzes in water to form hydrochloric acid and phosphoric acid.]
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, skin, nose, throat; pulmonary edema; eye, skin burns
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**No recommendation
							**Provide:**Eyewash, Quick drench
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Water flush immediately
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
Respirator Recommendations
			**NIOSH****Up to 10 ppm**: (APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**Up to 25 ppm**: (APF = 2000) Any supplied-air respirator that has a full facepiece and is 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: 0696

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
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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
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