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Home > Encyclopedia > Pentafluorophosphorane

Pentafluorophosphorane

Pentafluorophosphorane structure

Pentafluorophosphorane 

structure
  • CAS No:

    7647-19-0

  • Formula:

    F5P

  • Chemical Name:

    Pentafluorophosphorane

  • Synonyms:

    Phosphorane,pentafluoro-;Phosphorus fluoride (PF5);Pentafluorophosphorane;Phosphorus pentafluoride;Pentafluorophosphorus;137038-30-3

  • Categories:

    Inorganic Chemistry  >  Inorganic Salts

Description

colorless gas; nonflammable; fumes strongly in air; high thermal stability; critical temp 144.5°C; critical pressure 3.39MPa; enthalpy of fusion 12.1 kJ/mol; enthalpy of vaporization 17.2 kJ/mol; can be prepared by reaction of PF3 with F2; used as a polymerization catalyst and in electronics industry [AIR87] [HAW93] [MER06] [CRC10] [KIR78]


Phosphorus pentafluoride is a colorless, poisonous, nonflammable, compressed gas with a pungent odor. It is extremely irritating to skin, eyes and mucus membranes. It is very toxic by inhalation and can cause pulmonary edema. Toxic and corrosive fumes are generated when this material is exposed to water or steam. Prolonged exposure of the containers to fire or heat may result in their violent rupturing and rocketing. It is used as a polymerization catalyst.


Phosphorus pentafluoride is a colorless, poisonous, nonflammable, compressed gas with a pungent odor. It is extremely irritating to skin, eyes and mucus membranes. It is very toxic by inhalation and can cause pulmonary edema. Toxic and corrosive fumes are generated when this material is exposed to water or steam. Prolonged exposure of the containers to fire or heat may result in their violent rupturing and rocketing. It is used as a polymerization catalyst.|Phosphorus pentafluoride is a phosphorus halide.

Pentafluorophosphorane Basic Attributes

125.97

125.97

231-602-3

0OU1ESO71L

2198

DTXSID9064760

COLORLESS GAS

Characteristics

13.59000

2.96220

Colorless Gas

5.805g/l

-93.8 °C

-84.6 °C

-84.6°C

hydrolyzed in H2O, eventually to H3PO4 [MER06]

IN GENERAL, MATERIALS ... TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS DUE TO CONTACT HEAT, MOISTURE, ACIDS OR ACID FUMES, SHOULD BE STORED IN COOL WELL-VENTILATED PLACE, OUT OF ... SUN, AWAY FROM ... FIRE HAZARD & SHOULD BE PERIODICALLY INSPECTED & MONITORED. INCOMPATIBLE MATERIALS SHOULD BE ISOLATED ...

Decompose toxic hydrogen fluoride gas in water

Unpleasant odor

TROUTON CONSTANT 21.8; DIPOLE MOMENT 0; DOES NOT ATTACK DRY GLASS EVEN AT 250 °C, BUT A SLIGHT TRACE OF MOISTURE LEADS TO FORMATION OF POTASSIUM OXYTRIFLUORIDE (POF3) AND HYDROGEN FLUORIDE (HF); WATER HYDROLYSIS ULTIMATELY YIELDS PHOSPHORIC ACID; INTERMEDIATES ARE OXYFLUORPHOSPHATES; LEWIS ACID ... FORMS CRYSTALLINE ADDN PRODUCT PHOSPHORUS PENTAFLUORIDE-NITROGEN DIOXIDE (PF5-NO2) AT -10 °C WHICH DISSOCIATES ON WARMING|Reacts immediately with water to hydrolyze, first to POF3 and then to the fluorophosphonic acids.|Heat of fusion 12.1 kJ/mol; Heat of formation 1210 kJ/mol|... Behaves as a Lewis Acid showing electron-accepting properties, generally in a ratio of 1:1 with Lewis bases. It forms complexes with amines, ethers, nitriles, sulfoxides, and other bases.

Fumes strongly in air, with traces of moisture forming POF3 and HF (corrosive). Decomposed in water or moist air to form phosphoric acid and hydrofluoric Acid, corrosive [Merck 11th ed. 1989].

Acids, Strong Non-oxidizing

Water-Reactive

PHOSPHORUS PENTAFLUORIDE is a colorless, toxic gas, when exposed to air it strongly fumes. Vigorous reaction with water or steam leads to decomposition (hydrolysis) producing toxic and corrosive fumes. When heated to decomposition it emits toxic fumes of fluoride and oxides of phosphorus [Lewis, 3rd ed., 1993, p. 1034].

16.7 kJ/mol

Critical temperature: >25 °C; Critical pressure: Not available

Safety Information

2.3

2198

23-32-34

3/7-9-38-45

TH4070000

C,T

The warehouse is ventilated, low temperature and dry; stored separately from alkali and water-containing items

Toxic/Corrosive

FUMES STRONGLY IN AIR; HIGH THERMAL STABILITY

P260, P264, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P363, P403+P233, P405, P410+P403, P501

H280

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Excerpt from ERG Guide 125 [Gases - Corrosive]: Some may burn but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. For UN1005: Anhydrous ammonia, at high concentrations in confined spaces, presents a flammability risk if a source of ignition is introduced. (ERG, 2016)|Reactive - 2nd degree

|Danger|H280 (81.69%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]|P260, P264, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P363, P403+P233, P405, P410+P403, and P501|Aggregated GHS information provided by 142 companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Excerpt from ERG Guide 125 [Gases - Corrosive]: As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. SPILL: See ERG Table 1 - Initial Isolation and Protective Action Distances on the UN/NA 2198 datasheet. FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, consider initial evacuation for 1600 meters (1 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 125 [Gases - Corrosive]: Fully encapsulating, vapor-protective clothing should be worn for spills and leaks with no fire. Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Do not direct water at spill or source of leak. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Isolate area until gas has dispersed. (ERG, 2016)

Excerpt from ERG Guide 125 [Gases - Corrosive]: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible. (ERG, 2016)

If material involved in fire: Do not use water on material itself. Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Do not apply water to point of leak in tank car or container.

SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.|SRP: Local exhaust ventilation should be applied wherever there is an incidence of point source emissions or dispersion of regulated contaminants in the work area. Ventilation control of the contaminant as close to its point of generation is both the most economical and safest method to minimize personnel exposure to airborne contaminants.|If material not involved in fire: Keep material out of water sources and sewers. Attempt to stop leak if without undue personnel hazard. Do not use water on material itself.|Personnel protection: Avoid breathing vapors. Keep upwind. ... Avoid bodily contact with the material ... Do not handle broken packages unless wearing appropriate personal protective equipment. Wash away any material which may have contacted the body with copious amounts of water or soap and water.|Evacuation: If material leaking (not on fire) consider evacuation from downwind area based on amount of material spilled, location and weather conditions.

If ... THERE IS NO FIRE, go directly to the Table of Initial Isolation and Protective Action Distances /(see table below)/ ... to obtain initial isolation and protective action distances. IF THERE IS A FIRE, or IF A FIRE IS INVOLVED, go directly to the appropriate guide /(see guide(s) below)/ and use the evacuation information shown under PUBLIC SAFETY. /Phosphorus pentafluoride; Phosphorus pentafluoride, compressed/|/GUIDE 125: GASES - CORROSIVE/ Health: TOXIC; may be fatal if inhaled, ingested or absorbed through skin. Vapors are extremely irritating and corrosive. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution. /Phosphorus pentafluoride; Phosphorus pentafluoride, compressed/|/GUIDE 125: GASES - CORROSIVE/ Fire or Explosion: Some may burn, but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. /Phosphorus pentafluoride; Phosphorus pentafluoride, compressed/|/GUIDE 125: GASES - CORROSIVE/ Public Safety: CALL Emergency Response Telephone Number ... . As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. Keep unauthorized personnel away. Stay upwind. Many gases are heavier than air and will spread along ground and collect in low or confined areas (sewers, basements, tanks). Keep out of low areas. Ventilate closed spaces before entering. /Phosphorus pentafluoride; Phosphorus pentafluoride, compressed/|For more DOT Emergency Guidelines (Complete) data for PHOSPHORUS PENTAFLUORIDE (9 total), please visit the HSDB record page.

No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless that person is registered in conformance ... and the hazardous material is properly classed, described, packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardous materials regulations (49 CFR 171-177)./|The International Air Transport Association (IATA) Dangerous Goods Regulations are published by the IATA Dangerous Goods Board pursuant to IATA Resolutions 618 and 619 and constitute a manual of industry carrier regulations to be followed by all IATA Member airlines when transporting hazardous materials.|The International Maritime Dangerous Goods Code lays down basic principles for transporting hazardous chemicals. Detailed recommendations for individual substances and a number of recommendations for good practice are included in the classes dealing with such substances. A general index of technical names has also been compiled. This index should always be consulted when attempting to locate the appropriate procedures to be used when shipping any substance or article.

INHALATION MAY CAUSE PULMONARY EDEMA.

Drug Information

Excerpt from ERG Guide 125 [Gases - Corrosive]: TOXIC; may be fatal if inhaled, ingested or absorbed through skin. Vapors are extremely irritating and corrosive. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution. (ERG, 2016)

Excerpt from ERG Guide 125 [Gases - Corrosive]: Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. In case of contact with Hydrogen fluoride, anhydrous (UN1052), flush with large amounts of water. For skin contact, if calcium gluconate gel is available, rinse 5 minutes, then apply gel. Otherwise, continue rinsing until medical treatment is available. For eyes, flush with water or a saline solution for 15 minutes. Keep victim calm and warm. Keep victim under observation. Effects of contact or inhalation may be delayed. (ERG, 2016)

INTENSELY IRRITATING TO SKIN, EYES, MUCOUS MEMBRANES. INHALATION MAY CAUSE PULMONARY EDEMA.|SYMPTOMATOLOGY: 1. Severe gastritis or gastroenteritis with abdominal pain, retching, and prolonged vomiting, beginning 10-60 min after ingestion. Vomitus may become bloody. Diarrhea is sometimes violent; the feces are watery and later tarry. Dehydration becomes intense. 2. Shock, pallor, cyanosis and coldness. Rapid, weak or imperceptible pulse, low blood pressure, rapid and shallow respirations. 3. Sometimes breathing is deep and rapid, reflecting an accompanying metabolic acidosis. 4. Drowsiness, hyporeflexia, dilated pupils, coma. Vasomotor instability, shock or coma and a serum iron level in great excess of the total iron-binding capacity are poor prognostic signs. /Fluoride/|SYMPTOMATOLOGY: 5. Liver injury, consisting of hemorrhagic necrosis which is usually reversible. 6. Death from shock, usually in 4-5 hr. Sometimes following apparent recovery, pneumonia with fever or secondary shock may cause death 1-3 days later. 7. Among survivors pyloric stenosis and mild hepatic cirrhosis may be encountered as persistent sequelae, but recovery is usually complete. /Fluoride/|Corrosive to eyes and skin.|INHALATION MAY CAUSE PULMONARY EDEMA.

Pentafluorophosphorane Use and Manufacturing

Methods of Manufacturing

Phosphorus trifluoride is added to the reactor, and then the fluorine gas is introduced to react to generate phosphorus pentafluoride gas, and the finished product of phosphorus pentafluoride is obtained by cooling the trap. Its PF3+F2→PF5

Uses

Catalyst in ionic polymerization reactions.

GRADE: 99%.

Phosphorane, pentafluoro-: ACTIVE

Fire Hazards -> Reactive - 2nd degree

Computed Properties

Molecular Weight:125.9657778
XLogP3:2.7
Hydrogen Bond Acceptor Count:5
Exact Mass:125.96577781
Monoisotopic Mass:125.96577781
Heavy Atom Count:6
Complexity:37.1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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