Phosphorus pentachloride

Phosphorus pentachloride
Phosphorus pentachloride (gas phase structure)
Phosphorus pentachloride
Phosphorus pentachloride
Names
IUPAC names
Phosphorus pentachloride
Pentachloro-λ5-phosphane
Other names
Pentachlorophosphorane
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.030.043 Edit this at Wikidata
EC Number
  • 233-060-3
RTECS number
  • TB6125000
UNII
UN number 1806
  • InChI=1S/Cl5P/c1-6(2,3,4)5 ☒N
    Key: UHZYTMXLRWXGPK-UHFFFAOYSA-N ☒N
  • InChI=1/Cl5P/c1-6(2,3,4)5
    Key: UHZYTMXLRWXGPK-UHFFFAOYAP
  • ClP(Cl)(Cl)(Cl)Cl
Properties
Cl5P
Molar mass 208.22 g·mol−1
Appearance yellowish white crystals
Odor pungent, unpleasant[1]
Density 2.1 g/cm3
Melting point 160.5 °C (320.9 °F; 433.6 K)
Boiling point 166.8 °C (332.2 °F; 439.9 K) sublimation
reacts
Solubility soluble in CS2, chlorocarbons, benzene
Vapor pressure 1.11 kPa (80 °C)
4.58 kPa (100 °C)[2]
Structure
tetragonal
D3h (trigonal bipyramidal)
D
Thermochemistry
111.5 J/mol·K[2]
364.2 J/mol·K[2]
Hazards
GHS labelling:
GHS05: CorrosiveGHS06: ToxicGHS08: Health hazard[3]
Danger
H302, H314, H330, H373[3]
P260, P280, P284, P305+P351+P338, P310[3]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
3
0
2
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
660 mg/kg (rat, oral)[4]
205 mg/m3 (rat)[4]
1020 mg/m3 (mouse, 10 min)[4]
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 1 mg/m3[1]
REL (Recommended)
TWA 1 mg/m3[1]
IDLH (Immediate danger)
70 mg/m3[1]
Safety data sheet (SDS) ICSC 0544
Related compounds
Related phosphorus pentahalides
Phosphorus pentafluoride
Phosphorus pentabromide
Phosphorus pentaiodide
Related compounds
Phosphorus trichloride
Phosphoryl chloride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Phosphorus pentachloride is the chemical compound with the formula PCl5. It is one of the most important phosphorus chlorides/oxychlorides, others being PCl3 and POCl3. PCl5 finds use as a chlorinating reagent. It is a colourless, water-sensitive solid, although commercial samples can be yellowish and contaminated with hydrogen chloride.

  1. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0509". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b c Phosphorus pentachloride in Linstrom, Peter J.; Mallard, William G. (eds.); NIST Chemistry WebBook, NIST Standard Reference Database Number 69, National Institute of Standards and Technology, Gaithersburg (MD) (retrieved 2014-05-15)
  3. ^ a b c Phosphorus pentachloride
  4. ^ a b c "Phosphorus pentachloride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).