Tetraphosphorus Trisulfide
Title: Tetraphosphorus Trisulfide
CAS Registry Number: 1314-85-8
Additional Names: Phosphorus sesquisulfide; trisulfurated phosphorus
Molecular Formula: P4S3
Molecular Weight: 220.09
Percent Composition: P 56.29%, S 43.71%
Literature References: Prepn by fusing red phosphorus with sulfur: Stock, Ber. 43, 150 (1910); also from white phosphorus and sulfur in a high-boiling solvent such as a-chloronaphthalene: Frary, DE 309618 (1918); Chem. Zentralbl. 1919, II, 55.
Properties: Yellowish-green, long, rhombic needles from benzene. Stable to air. d420 2.03. mp 172.5°. bp 407.5°. Insol in cold water. Dec by hot water, yielding H2S. Soly in carbon disulfide (20°): about 60% (w/w). Sol in benzene, similar hydrocarbons, phosphorus trichloride.
Melting point: mp 172.5°
Boiling point: bp 407.5°
Density: d420 2.03
Use: In match tips.

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