Tripotassium phosphate

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Tripotassium phosphate
Tripotassium phosphate.png
IUPAC name
Potassium phosphate
Systematic IUPAC name
Potassium tetraoxidophosphate(3−)
Other names
Potassium phosphate, tribasic
3D model (JSmol)
ECHA InfoCard 100.029.006
Molar mass 212.27 g/mol
Appearance White deliquescent powder
Density 2.564 g/cm3 (17 °C)
Melting point 1,380 °C (2,520 °F; 1,650 K)
90 g/100 mL (20 °C)
Solubility in ethanol Insoluble
Basicity (pKb) 1.6
Main hazards Irritant
Safety data sheet MSDS
R-phrases (outdated) R36-R38
S-phrases (outdated) S26-S36
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point Non-flammable
Related compounds
Other cations
Trisodium phosphate
Triammonium phosphate
Tricalcium phosphate
Related compounds
Monopotassium phosphate
Dipotassium phosphate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Potassium phosphate is a water-soluble ionic salt which has the chemical formula K3PO4. It is used as a food additive for its properties as an emulsifier, foaming agent, and whipping agent.[1] In combination with fatty acids, it is a potential antimicrobial agent in poultry processing.[2] As a fertilizer, its proportions of N, P2O5, and K2O are 0-33-67.


  1. ^ "NutritionData Food Additive Identifier". 
  2. ^ Hinton, Arthur; Ingram, Kimberly D. (July 2005). "Microbicidal Activity of Tripotassium Phosphate and Fatty Acids toward Spoilage and Pathogenic Bacteria Associated with Poultry". Journal of Food Protection (7): 1336–1534.