Tetra sodium pyrophosphate

Tetrasodium pyrophosphate is used in processed meats and seafood to bind water, and in instant puddings to thicken them without heat.

Where it is and isn’t permitted

Status of Tetra sodium pyrophosphate 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 182.6789retrieved 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

Made by heating disodium phosphate to link two phosphate units.

  • Vegan
  • Vegetarian
InChIKey
FQENQNTWSFEDLI-UHFFFAOYSA-J
PubChem
CID 24403

Every name it appears under

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

CAS registry number

  • 1004291-85-3
  • 7722-88-5

As it appears in regulation

  • Tetra sodium pyrophosphate

Other names

  • Anhydrous tetrasodium pyrophosphate
  • Caswell No. 847
  • Diphosphoric acid tetrasodium
  • Diphosphoric acid, sodium salt (1:4)
  • Diphosphoric acid, tetrasodium salt
  • EPA Pesticide Chemical Code 076405
  • HSDB 854
  • Natrium pyrophosphat
  • Phosphotex
  • PYP
  • Pyrophosphoric acid tetrasodium salt
  • Sodium diphosphate
  • Sodium diphosphate (Na4(P2O7))
  • Sodium diphosphate (Na4P2O7)
  • Sodium diphosphate tetrabasic
  • Sodium diphosphate, anhydrous
  • Sodium phosphate (Na4P2O7)
  • Sodium pyrophosphate
  • Sodium pyrophosphate (Na4P2O7)
  • Sodium pyrophosphate (USAN)
  • Sodium pyrophosphate anydrous
  • Sodium pyrophosphate, tetrabasic
  • SODIUMPYROPHOSPHATE
  • tetra sodium pyrophosphate
  • Tetranatriumpyrophosphat
  • tetrasodium (phosphonooxy)phosphonate
  • Tetrasodium diphosphate
  • TETRASODIUM PYROPHOSPHATE
  • Tetrasodium pyrophosphate, anhydride
  • Tetrasodium pyrophosphate, anhydrous
  • Tetrasodium Pyrophosphoate
  • tetrasodium;phosphonato phosphate
  • TSPP
  • V34 Colour Corrector
  • Victor TSPP

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/tetra-sodium-pyrophosphate.json