Sodium Hexametaphosphate Granular

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Sodium Hexametaphosphate

 Used in a wide variety of applications. Water treatment, Water softening, Tie Dye, detergents, and for removing lime and scale deposits. SHMP or Calgon as it is commonly known, is also used for striping soap detergents out of cloth diapers.

In detergents SHMP is used since it is very effective on grease and greasy soil. It helps clean and stops the greasy soil from redepositing on fabric.

Synonyms: Hexasodium salt, Calgon, Calgon S, Hexasodium metaphosphate, Metaphosphoric acid (H6P6O18), hexasodium salt, Metaphosphoric acid,Sodium metaphosphate (Na6(PO3)6), Sodium phosphate (Na6(PO3)6), Graham's Salt, Sodium Polymetaphosphate 

Product Code, INCI Name and CAS No.

  • INCI Name: Sodium Hexametaphosphate
  • CAS no: 68915-31-1
  • EINECS no.: 272-808-3


  • Appearance: White to Clear Granules  
  • Odor: Odor Neutral
  • Formula: Na(n+2)PnO(3n+1)
  • P2O5 Content: 66.5% minimum
  • Solubility: Solubility in Water 60% at 77°F
  • Phosphorus Content Percentage: 29.5%


Keep in a cool (preferably below 85°F, the cooler the better), dark and dry store-room.

Shelf Life

Under optimal storage conditions, in original unopened drums/containers, minimum two years.

Safety Data Sheet