Phosphorus pentasulfide

Phosphorus pentasulfide is the inorganic compound with the formula P2S5 (empirical) or P4S10 (molecular). This yellow solid is the one of two phosphorus sulfides of commercial value. Samples often appear greenish-gray due to impurities. It is soluble in carbon disulfide but reacts with many other solvents such as alcohols, DMSO, and DMF.

Phosphorus pentasulfide
Names
Other names
  • Phosphorus sulfide
  • Sulfur phosphide
  • Phosphorus persulfide
  • Diphosphorus pentasulfide
  • Tetraphosphorus decasulfide
  • Phosphorus decasulfide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.858
EC Number
  • 215-242-4
RTECS number
  • TH4375000
UNII
  • InChI=1S/P4S10/c5-1-9-2(6)12-3(7,10-1)14-4(8,11-1)13-2 N
    Key: CYQAYERJWZKYML-UHFFFAOYSA-N N
  • InChI=1/P4S10/c5-1-9-2(6)12-3(7,10-1)14-4(8,11-1)13-2
    Key: CYQAYERJWZKYML-UHFFFAOYAD
  • P12(=S)SP3(=S)SP(=S)(S1)SP(=S)(S2)S3
Properties
P4S10
Molar mass 444.50 g/mol
Appearance Yellow solid
Odor Rotten eggs
Density 2.09 g/cm3
Melting point 288 °C (550 °F; 561 K)
Boiling point 514 °C (957 °F; 787 K)
Hydrolyses
Solubility in other solvents
Vapor pressure 1 mmHg (300°C)
Structure
triclinic, aP28
P1 (No. 2)
Td
Hazards
Lethal dose or concentration (LD, LC):
389 mg/kg (oral, rat)
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 mg/m3
REL (Recommended)
 TWA 1 mg/m3 ST 3 mg/m3
IDLH (Immediate danger)
 250 mg/m3
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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