Tetrasodium Pyrophosphate

AKA “Sodium pyrophosphate, 7722-88-5, TSPP, Tetrasodium diphosphate, Phosphotex, Diphosphoric acid, tetrasodium salt, Sodium diphosphate, Victor TSPP, Natrium pyrophosphat”

Ingredient

Ingredient Facts

Tetrasodium pyrophosphate

AKA: 7722-88-5, TSPP, Tetrasodium diphosphate, Phosphotex, Diphosphoric acid, Tetrasodium salt, Sodium diphosphate, Victor TSPP, Natrium pyrophosphat

Ingredient · Anticaking · EWG: 1

Synthetic

Chelating Agent

Clean

Tetrasodium pyrophosphate appears as odorless, white powder or granules. mp: 995 °C. Density: 2.53 g/cm3. Solubility in water: 3.16 g/100 mL (cold water); 40.26 g/100 mL boiling water. Used as a wool de-fatting agent, in bleaching operations, as a food additive. The related substance tetrasodium pyrophosphate decahydrate (Na4P2O7*10H2O) occurs as colorless transparent crystals. Loses its water when heated to 93.8 °C.

Solubility 7 % at 77 °F (NIOSH, 2024)

Formula

Na4O7P2

Mol. Weight

265.90

CAS #

7722-88-5

Form

Powder

State

See origin →

Functions

Anticaking

Buffering

Chelating

Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.

Oral Care

Prevents Clumping

Stabilizes pH

Removes Metal Ions

Supports dental health

Maintains optimal pH

Binds metal ions

Traditional Use

Inorganic salt developed in the 20th century as a buffering and chelating agent in cosmetics. Used industrially before being adopted to improve product stability and texture.