Characteristic

Sodium hexametaphosphate (SHMP) is a hexamer of composition (NaPO3)6. Sodium hexametaphosphate of commerce is typically a mixture of polymeric metaphosphates, of which the hexamer is one, and is usually the compound referred to by this name. Such a mixture is more correctly termed sodium polymetaphosphate.

Chemical formula:(NaPO₃)₆

Formula weight: 611.77g/mol

Appearance：White crystals

Melting Point: 628°C

Boiling Point: 1500°C

Refractive Index: 1.482g/ml

Sensitivity: Ambient temperatures.

Solubility: Soluble in water. Insoluble in organic solvents

Application

Sodium hexametaphosphate is a food additive used in dairy product, canned milk, packaged egg whites, ice cream, seafood and meat processing. It is also used as a sequestrant and water softening agent and detergents. It is an active ingredient in toothpastes as an anti-staining agent. It prevents the steel corrosion. Further, it is used in building, water treatment and in photographic developing. In addition, it is used as a retarder in dental alginate impression materials and as a thinner for petroleum drilling fluids.