Phosphorus oxychloride

 

Phosphorus oxychloride

Chemical formula	POCl3
OTP appearance	clear fuming liquid
Molar Mass(g/mol)	153.33
Density(g/cc)	1.645
Melting Point(°C)	1.25
Boiling Point(°C)	105.8
Solubility in water(g/L)	reacts
NFPA 704	0 3 2 W

Uses

Justification Questioned

Other

• Reacts to form phosphate esters / organophosphates such as triphenylphosphate

  POCl₃ + 3 PhOH → P(O)(OPh)₃ + 3 HCl

Natural occurrence

• Does not occur naturally

Production

Synthesis

from phosphorus trichloride

• with oxygen

  2 PCl₃ + O₂ → 2 POCl₃

• with chlorate

  3 PCl₃ + KClO₃ → 3 POCl₃ + KCl

from phosphorus pentachloride

• with water

  PCl₅ + H₂O → POCl₃ + 2 HCl

from phosphorus pentoxide

• with sodium chloride

  2 P₂O₅ + 3 NaCl → 3 NaPO₃ + POCl₃

See Also

• Phosphorus trichloride
• Phosphorus pentachloride