Sodium hexametaphosphate(SHMP)

Our company's Sodium hexametaphosphate (SHMP) is content of 68% industrial grade and food grade. 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. SHMP hydrolyzes in aqueous solution, particularly under acidic conditions, to sodium trimetaphosphate and sodium orthophosphate.

Uses

Our company's SHMP is used as a sequestrant and has applications with in a wide variety of industries, including as a food additive in which it is used under the E number E452i. Sodium carbonate is sometimes added to SHMP to raise the pH to 8.0-8.6, which produces a number of SHMP products used for water softening and detergents. Also used as a dispersing agent to break down clay and other soil types.

Sodium hexametaphosphate is also a whitening ingredient included in some whitening toothpastes and mouthwashes. It is also an ingredient in fake maple syrup.

Other names

Calgon S; Glassy sodium; Graham's Salt; Hexasodium metaphosphate; Metaphosphate acid ; Hexasodium salt.

Identifiers

CAS number10124-56-8

H Scode2835390000

Properties

Molecular formula(NaPO3)6

Molar mass611.77 g/mol

AppearanceWhite, odorless, crystalline powder

Density2.484 g/cm3

Melting point550 °C

Boiling point1500 °C

Solubility in watersoluble

Solubility in organic solventsinsoluble

Specification:

Index	Industrial grade	Food grade
Total phosphates (as P2O5)%≥	68.0	68.0
Inactive phosphate (as P2O5 )%≤	7.5	7.5
Iron(as Fe)%≤	0.05	0.05
PH value	5.8-7.3	5.8-6.5
Solubility	qualified	qualified
Heavy metals (as Pb)%≤		0.001
Arsenic (as As)%≤		0.0003
Fluoride (as F)%≤		0.003
Water insoluble matter %≤	0.05	0.06
Polymerization	9-21	9-21
Fineness	60-80	60-80

Payment terms: TT 30% in advance and the residual 70% should be paid when the buyer received the Copy of the B/L