White phosphorus CAS 12185-10-3 is a simple substance of phosphorus, with the chemical formula P4. The appearance is a white or light yellow semi transparent solid. Soft in texture, brittle in cold weather, with darker light color. Green phosphorescence and white smoke are generated in the dark when exposed to air. It ignites at about 40 ℃ in humid air and slightly higher in dry air.

White phosphorus can directly react with halogens, sulfur, metals, etc., form phosphoric acid with nitric acid, and form phosphine and sodium hypophosphate or potassium phosphate with sodium hydroxide or potassium hydroxide. Avoid contact with potassium chlorate, potassium permanganate, peroxides, and other oxides.

Chinese name: White phosphorus

Foreign name: Photosphorus

Nickname: Yellow phosphorus

Chemical formula: P4

Molecular weight: 123.895

CAS login number: 12185-10-3

Melting point: 44.1 ℃（ α Type)

Boiling point: 280.5 ℃

Water solubility: insoluble in water

Density: 1.828 g/cm ³ （ α Type)

Appearance: White to yellow waxy solid with a garlic odor, emitting light green phosphorescence in the dark

Physical and chemical properties

Solubility: insoluble in water, slightly soluble in benzene and chloroform, easily soluble in carbon disulfide.

Density: 1.828 g/cm3（ α Type) 1.88g/cm3（ β Type)

Relative vapor density (air=1): 4.42 [2]

Saturated vapor pressure (kPa): 0.13 (76.6 ℃) [2]

Combustion heat (kJ/mol): -3093.2 [2]

Critical temperature: 721 ℃ [2]

Ignition temperature: 30 ℃

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