Sodium hexametaphosphate
CAS No.: 10124-56-8
EINECS No.:233-343-1
Molecular weight:611.7
HS Code: 2835391900(Industrial Grade)/2835391100( Food Grade)
Molecular Formula: Na6P6O18
Synonyms: Calgon S; Glassy sodium; Graham’s salt; Hexasodium metaphosphate; Metaphosphoric acid; hexasodium salt; Sodium metaphosphate; Sodium hexametaphosphate; Metaphosphoric acid hexasodium salt
Sodium hexametaphosphate Properties:
Sodium hexametaphosphate (SHMP) is a salt of composition Na6[(PO3)6].[3] Sodium hexametaphosphate of commerce is typically a mixture of metaphosphates (empirical formula: NaPO3), 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. They are white solids that dissolve in water.
Sodium hexametaphosphate Properties:
SHMP is used as a sequestrant and has applications within 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. A significant use for sodium hexametaphosphate is as a deflocculant in the production of clay-based ceramic particles. It is also used as a dispersing agent to break down clay and other soil types for soil texture assessment. It is used as an active ingredient in toothpastes as an anti-staining and tartar prevention ingredient. As a food additive, SHMP is used as an emulsifier. Artificial maple syrup, canned milk, cheese powders and dips, imitation cheese, whipped topping, packaged egg whites, roast beef, fish fillets, fruit jelly, frozen desserts, salad dressing, herring, breakfast cereal, ice cream, beer, and bottled drinks, among other foods, can contain SHMP.
Sodium hexametaphosphate Package:
25kg/bag or according to clients request.
Food grade
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Test Item Specification / Test Result
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Appearance Colorless transparent glassy or granule / Pass
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General phosphate (P2O5) % ≧68.0 / 68.3
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Inactive phosphate(P2O5)% ≦7.5 / 6.4
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Water insoluble % ≦0.06 / 0.02
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Arsenic ,as As % ≦0.0003 / <0.0003
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Heavy metals as (Pb)% ≦0.001 / ≦0.001
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Fluoride(F) ≦0.0003 / <0.0003
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Sulphate(SO4) ≦50ppm / ≦50ppm
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Fe % ≦0.05 / ≦0.05
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PH Value 5.8-6.5 / 6.3
Industrial grade
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Test Item Specification / Test Result
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Appearance White powder / White powder
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Sodium hexametaphosphate(SHMP)% ≥68.0 / 68.02
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Inactive phosphates(P2O5)% ≤7.5 / 7.5
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Insoluble matter % ≤0.1 / 0.01
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Fe % ≤0.01 / 0.005
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PH value 5.8-7.3 / 6.7
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Arsenic (As) % ≤0.002 / 0.001
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Whiteness % ≥90 / 95
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Average degree of polymerization% 10-16 / 12.1