Phosphorus triiodide

Phosphorus triiodide
Phosphorus triiodide
Space-filling model of the phosphorus triiodide molecule
Sample of phosphorus triiodide
Names
IUPAC names
Phosphorus triiodide
Phosphorus(III) iodide
Other names
Triiodophosphine
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.302 Edit this at Wikidata
EC Number
  • 236-647-2
UNII
  • InChI=1S/I3P/c1-4(2)3 checkY
    Key: PZHNNJXWQYFUTD-UHFFFAOYSA-N checkY
  • InChI=1/I3P/c1-4(2)3
    Key: PZHNNJXWQYFUTD-UHFFFAOYAR
  • IP(I)I
Properties
PI3
Molar mass 411.68717 g/mol
Appearance dark red solid
Density 4.18 g/cm3
Melting point 61.2 °C (142.2 °F; 334.3 K)
Boiling point 200 °C (392 °F; 473 K) (decomposes)
Decomposes
Structure
Trigonal pyramidal
Hazards
GHS labelling:[1]
GHS05: CorrosiveGHS07: Exclamation mark
Danger
H314, H335
P260, P280, P301+P330+P331, P303+P361+P353, P305+P351+P338
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
W
Flash point non-flammable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Phosphorus triiodide (PI3) is an inorganic compound with the formula PI3. A red solid, it is[2] too unstable to be stored for long periods of time; it is, nevertheless, commercially available. It is widely used in organic chemistry for converting alcohols to alkyl iodides. It is also a powerful reducing agent.

  1. ^ GHS: Sigma-Aldsrich 241555
  2. ^ L. G. Wade, Jr., Organic Chemistry, 6th ed., p. 477, Pearson/Prentice Hall, Upper Saddle River, New Jersey, USA, 2005.