Phosphorus(III) fluoride

  • Phosphorus trifluoride
  • Trifluorophosphine
Formula
PF3
Structure
Description
Colorless gas

Registry Numbers and Inventories.
CAS
7783-55-3
EC (EINECS/ELINCS)
232-008-7
2 20 24 25 26 27 39 46
RTECS
TH3850000
RTECS class
Other
UN (DOT)
1955
Merck
12,7516
Beilstein/Gmelin
1632 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed

Properties.
Formula
F3P
Formula mass
87.97
Melting point, °C
-151
Boiling point, °C
-101
Vapor pressure, mmHg
40800 (25 C)
Vapor density (air=1)
3.03 (25 C)
Density
1.6 g/mL (25 C)
Solubility in water
Reacts, slightly soluble
Dipole moment
0.77 D
Heat of vaporization
14.6 kJ/mol

Hazards and Protection.
Storage
Store and handle in accordance with all current regulations and standards. Keep separated from incompatible substances.
Protection
Wear splash resistant safety goggles. Provide an emergency eye wash fountain and quick drench shower in the immediate work area. Wear appropriate chemical resistant clothing and gloves.
Respirators
Under conditions of frequent use or heavy exposure, respiratory protection may be needed. Respiratory protection is ranked in order from minimum to maximum. Consider warning properties before use. Any chemical cartridge respirator with acid gas cartridge(s). Any chemical cartridge respirator with a full facepiece and acid gas cartridge(s). Any air-purifying respirator with a full facepiece and an acid gas canister. For Unknown Concentrations or Immediately Dangerous to Life or Health- Any supplied-air respirator with full facepiece and operated in a pressure-demand or other positive-pressure mode in combination with a separate escape supply. Any self-contained breathing apparatus with a full facepiece.
Small spills/leaks
Do not touch or walk through spilled material. Fully encapsulating, vapor protective clothing should be worn for spills and leaks with no fire. Stop leak if you can do it without risk or turn leaking containers so that gas escapes rather than liquid. Do not direct water at spill or source of leak. Isolate area until gas has dispersed.
Incompatibilities
Bases, halogens, amines, oxidizing materials and water.
Decomposition
Produces halogenated compounds and oxides of phosphorus when heated to decomposition.

Fire.
Flash Point,°C
-18
Fire fighting
Do not get water inside container. Move container from fire area if it can be done without risk. Cool containers with water spray until well after the fire is out. Stay away from the ends of tanks. Keep unnecessary people away, isolate hazard area and deny entry. Use extinguishing agents appropriate for surrounding fire. Flood with fine water spray. Cool containers with water spray until well after the fire is out. Apply water from a protected location or from a safe distance. Avoid inhalation of material or combustion by-products. Stay upwind and keep out of low areas. Consider downwind evacuation if material is leaking. Extinguishing agents: Small Fires: Dry chemical or CO2. Large Fires: Water spray, fog or regular foam.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. C ontainers may rupture or explode if exposed to heat. May react on contact with water.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure effects
Long term exposure can result in tooth decay and digestive disorders.
   Ingestion
No available data.
   Inhalation
May cause respiratory tract irritation with coughing, choking, and possibly burns of the mucous membranes. Other initial symptoms may include dizziness, headache, nausea and weakness. In some cases pulmonary edema may develop, either immediately in severe cases, or more likely after a latent period of 5-72 hours. The symptoms may include tightness in the chest, dyspnea, frothy sputum, and cyanosis. Physical findings may include hypotension, weak, rapid pulse and moist rales. Recovery may be prolonged and relapses are possible. In severe exposures. death due to anoxia may occur within a few hours after onset of pulmonary edema symptoms or following a relapse.
   Skin
May react with moisture to form hydrogen fluoride which is an acidic corrosive. Absorption through the skin is also possible. Effects may include thirst, excessive salivation, sweat and nausea. In addition, repeated exposure to low levels may result in fluorosis.
   Eyes
May react with moisture to form hydrogen fluoride which is an acidic corrosive. May cause burns and blindn ess.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
If adverse effects occur, remove to uncontaminated area. Give artificial respiration if not breathing. If breathing is difficult, oxygen should be administered by qualified personnel. Get immediate medical attention.
   Skin
Wash skin with soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get immediate medical attention. Thoroughly clean and dry contaminated clothing and shoes before reuse. Destroy contaminated shoes.
   Eyes
Immediately flush with running water for at least 20 minutes. Effects may be delayed.

Transport.
UN number
1955
Response guide
Hazard class
2.2