Sodium Hexametaphosphate Properties, Molecular Formula, Applications - WorldOfChemicals

Sodium Hexametaphosphate Properties

Sodium Hexametaphosphate

Sodium Hexametaphosphate-Molecule 3D Struture
Molecule Structure Image

Description

 

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. It is more correctly termed sodium polymetaphosphate. It is prepared by melting monosodium orthophosphate, followed by rapid cooling. It hydrolyzes in aqueous solution, particularly under acidic conditions, to sodium trimetaphosphate and sodium orthophosphate. It is used as a sequestrant and has applications with in a wide variety of industries, including as a food additive. One of the lesser-known uses for sodium hexametaphosphate is as a deflocculant in the making of terra sigillata, a ceramic technique using a fine particled slip. The sodium hexametaphosphate causes the heavy particles in the slip to drop to the bottom allowing the fine particles to be siphoned off and applied to a green ware ceramic surface.

Chemical Properties

Appearance White crystalline powder
Boiling Point 1500 °C
CAS Number 10124-56-8
Density 2.48 g/cm3
EINECS Number 233-343-1
Main Hazards Irritant
Melting Point 550 °C
Molar Mass 611.7 g/mol
Molecular Formula Na6O18P6
Refractive 1.482
Related Compounds Sodium Trimetaphosphate
Solubility Soluble
Synonyms Calgon S;Glassy Sodium;Graham's Salt;Hexasodium Metaphosphate;Metaphosphoric Acid, Hexasodium Salt;SHMP
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