Phosphorus pentasulfide CAS 1314-80-3 is an inorganic compound with the chemical formula P2S5. It is a yellow solid and stable when dried. However, it hydrolyzes into phosphoric acid and hydrogen sulfide in water, giving it a foul egg odor in the air.

Chinese name: Phosphorus pentasulfide

Foreign name: phophorus pentasulfide

Chemical formula: P2S5

Molecular weight: 222.273

CAS login number: 1314-80-3

EINECS login number: 215 242 4

Melting point: 286 ℃

Boiling point: 514 ℃

Density: 2.09 g/cm ³

Appearance: Yellow solid

Physical and chemical properties

Density: 2.09g/cm3

Melting point: 286 ℃

Boiling point: 514 ℃

Refractive index: 1.805

Saturated vapor pressure: 0.13kPa (300 ℃)

Critical pressure: 23.2MPa

Ignition temperature: 141.6 ℃

Appearance: White powder

Solubility: soluble in carbon disulfide, soluble in alkaline aqueous solution

Purpose

Phosphorus pentasulfide is an important raw material for pesticide synthesis. It reacts with alcohols to obtain important phosphorus containing intermediate sulfides, which can be used to synthesize various dithiophosphate pesticides, such as dimethoate, phorate, malathion, etc; Chlorination of sulfides yields another important class of phosphorus containing intermediate chlorides, which can be used to synthesize various thiophosphate pesticides, such as fenitrothion, phoxim, diazinon, etc. In addition, they are also used as non-ferrous metal beneficiation agents, advanced lubricant additives, and as adjuvants for match making, pharmaceutical products, and rubber vulcanization.

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