Phosphorus sesquisulfide
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Phosphorus sesquisulfide, also called phosphorus trisulfide, tetraphosphorus trisulfide or phosphorus sulfide, is an inorganic compound of phosphorus and sulfur. Its chemical formula is 43 and its CAS number is [1314-85-8][link]. It is a yellow-green to grey solid with melting point 174 °C and boiling point 408 °C. It is readily soluble in carbon disulfide.
It was discovered by the Swedish chemist Jöns Jakob Berzelius (1777 - 1849); and first produced safely in commercial quantities, in 1899, by Albright and Wilson.
It is used in manufacture of phosphorus pentasulfide and in organic synthesis.
A mixture of 25% of phosphorus sesquisulfide and 75% of potassium perchlorate is used for the heads of strike-anywhere matches.
See also:
- Phosphorus pentasulfide, P2S5.
- Phosphorus trisulfide, P2S3.
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