Sodium hexametaphosphate (Graham’s Salt)


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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. It is more correctly termed sodium polymetaphosphate.

  • Used as a sequestrant and has applications within a wide variety of industries including as a food additive.
  • Used as a deflocculant in the production of clay-based ceramic articles.
  • Dispersing agent to break down clay and other soil types.
  • Claimed as a anti-staining and tartar prevention ingredient.

Minimum Assay: >68%

Molecular Formula: (NaPO3)6 (Mainly)

Molecular Weight: 611.78

Solubility in Water (% weight): Soluble in water

Melting Point: 628 °C

Boiling Point: 1500°C

pH: 7.0

Solubility: Soluble in water

Chloride (Cl): <0.02%

Heavy Metals (as Pb): <0.005%

Iron (Fe): <0.01%

Hazard Phrases: Not considered harmful under normal laboratory conditions.

Cas No: 68915-31-1

Einecs No: 272-808-3


Additional information

Weight N/A
Pack Size

250gm, 500gm, 1kg, 2.5kg, 5kg