GREMONT CHEMICAL COMPANY LIMITED
Polyphosphoric Acid
orthophosphoric acid, phosphoric(V) acid
 
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PROPERTIES   &  USAGE
Properties   Usage
Chemical formula H3O4P Food additive
Molar mass 97.99 g·mol−1 Rust removal
Density  1.885 g/mL (liquid) In medicine
  1.685 g/mL (85% solution)  
  2.030 g/mL (crystal at 25 °C)  
Melting point  42.35 °C (108.23 °F; 315.50 K) Other applications
  (anhydrous)  
  29.32 °C (84.78 °F; 302.47 K)  
  (hemihydrate)  
Boiling point  158 °C (316 °F; 431 K)
  213 °C (415 °F; 486 K)
  decomposes  
 
 
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