Chemical formula：K4P2O7

Molecular weight：330.34

Property:white powder or mass, specific gravity: 2.534, M.P.: 1109 ; Soluble in water, insoluble in ethanol and its aqueous solution is alkali. Solubility(25 ): 187g/100g water; PH (1% aqueous solution): 10.2; It has the same properties as other condensed phosphate.

Uses: mainly used as complexing agent in cyanogen-free electroplating, substituting for sodium cyanide. It also can be used as pretreating agent in electroplating and pyrophosphoric acid electroplating solution, as ingredient and additive in all kinds of detergents and metal surface treating agent, as clay dispersant in ceramic industry, as dispersant and buffering agent in pigment and dyes, to remove a small amount of ferric ion from water in blanching and dyeing industry to improve quality.