Agent Name

Potassium phosphate, tribasic

CAS Number

7778-53-2

Formula

O4-P.3K

Major Category

Metals

Synonyms

Phosphoric acid, tripotassium salt; Potassium orthophosphate; Potassium phosphate; Tripotassium phosphate; Phosphoric acid, potassium salt (1:3); Tripotassium orthophosphate; [ChemIDplus] Potassium phosphate, anhydrous; [Alfa Aesar MSDS]

Category

Phosphates, Metallic Salts

Description

Deliquescent solid; [Merck Index] Colorless or white odorless, hygroscopic solid; [JECFA] White granules; [Alfa Aesar MSDS]

Sources/Uses

Used as emulsifier, pH control agent, and stabilizer or thickener in foods; [ExPub: FDA] Used as buffer, sequestrant, and emulsion stabilizer in foods; [JECFA] Formerly used in hospital germicide detergents, (registration cancelled in 1986), liquid bathroom cleansers (cancelled in 1989), and laboratory bactericidal cleansers (cancelled in 1989); [NPIRS]

Comments

Maximum tolerated daily intake is 70 mg/kg (as P); [JECFA] A moderate eye irritant; Causes dermatitis in dermal lethal-dose studies of rabbits; Causes somnolence and GI changes in oral lethal-dose studies of rats; [RTECS] A skin and strong eye irritant; [Alfa Aesar MSDS]

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