Phosphorus Pentasulfide
Title: Phosphorus Pentasulfide
CAS Registry Number: 1314-80-3
Additional Names: Phosphoric sulfide; thiophosphoric anhydride; phosphorus persulfide
Molecular Formula: P2S5
Molecular Weight: 222.27
Percent Composition: P 27.87%, S 72.13%
Literature References: Exists as P4S10. Conveniently prepd by fusing red phosphorus with sulfur: Stock, Herscovici, Ber. 43, 1223 (1910); Klement in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 567. Manuf: Faith, Keyes & Clark's Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Interscience, New York, 4th ed., 1975) pp 650-653.
Properties: Light yellow, triclinic crystals; peculiar odor. d 2.09. mp 286-290°; bp 513-515°. Dec by water forming H3PO4 and H2S; sol in carbon disulfide, in aq soln of alkali hydroxides. Keep tightly closed.
Melting point: mp 286-290°
Boiling point: bp 513-515°
Density: d 2.09
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin and respiratory system; apnea, coma and convulsions; conjunctival pain, lacrimation, photophobia, kerato-conjunctivitis and corneal vesiculation; dizziness; headache; fatigue; irritability, insomnia; GI disturbance. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 256.
Use: In manuf of lube oil additives and pesticides. Manuf safety matches, ignition compds, and for introducing sulfur into organic compds.

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