Sodium metaphosphate

Sodium metaphosphate is a sequestrant, emulsifying salt and texturiser, used in processed cheese and meat.

Where it is and isn’t permitted

Status of Sodium metaphosphate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 182.6769retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Produced by heating sodium phosphate to a glassy long-chain polyphosphate.

  • Vegan
  • Vegetarian
InChIKey
AQMNWCRSESPIJM-UHFFFAOYSA-M
PubChem
CID 16133893

Every name it appears under

22 recorded names. A label may use any of them.

CAS registry number

  • 10361-03-2
  • 14550-21-1
  • 35270-09-8
  • 50813-16-6

As it appears in regulation

  • Sodium metaphosphate

Other names

  • 532IUT7IRV
  • HSDB 5055
  • Insoluble metaphosphate
  • Kurrol's salt
  • Maddrell's salt
  • Metaphosphoric acid (HPO3), sodium salt
  • Metaphosphoric acid (HPO3), sodium salt (1:1)
  • Metaphosphoric acid, sodium salt
  • NaO3P
  • Sodium Kurrol's salt
  • Sodium metaphosphate
  • SODIUM METAPHOSPHATE (NA(PO3))
  • Sodium metaphosphate (NaPO3)
  • Sodium phosphate (NaPO3)
  • sodium phosphenate
  • Sodium-m-phosphate monohydrate
  • Sporix

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/sodium-metaphosphate.json