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Metaphosphoric acid

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Metaphosphoric acid Basic information
Metaphosphoric acid Chemical Properties
  • Melting point:21°C
  • Boiling point:158°C
  • Density 2 g/cm3
  • vapor pressure 0.04 hPa at 20 °C
  • storage temp. Store below +30°C.
  • solubility Soluble in alcohol.
  • form pieces
  • color Glassy
  • OdorOdorless
  • Water Solubility Decomposes in water. Soluble in alcohol.
  • Sensitive Hygroscopic
  • Merck 14,7345
  • Stability:Stable. Incompatible with strong bases, most metals.
  • CAS DataBase Reference37267-86-0(CAS DataBase Reference)
  • EPA Substance Registry SystemMetaphosphoric acid (37267-86-0)
Safety Information
  • Hazard Codes C
  • Risk Statements 34-35-22-37
  • Safety Statements 26-36/37/39-45
  • RIDADR UN 3260 8/PG 3
  • WGK Germany 3
  • 3
  • TSCA Yes
  • HazardClass 8
  • PackingGroup III
  • HS Code 28092019
MSDS
Metaphosphoric acid Usage And Synthesis
  • Physical PropertiesGlass-like colorless solid; soft and transparent; deliquesces; sublimes at red heat; dissolves slowly in cold water, decomposing to phosphoric acid; soluble in alcohol.
  • PreparationMetaphosphoric acid is obtained as a polymeric glassy solid by prolonged heating of phosphoric acid. Either phosphoric acid, H3PO4, or pyrophosphoric acid, H4P2O7, when heated above 300°C, on cooling yields the transparent glassy mass of composition (HPO3)n.
    Metaphosphoric acid also is obtained from partial hydration of phosphorus pentoxide by dissolving it in cold water.
  • UsesAn inorganic reagent used for research purposes
  • UsesIn dentistry for making zinc oxyphosphate cement; as reagent in chemical analysis.
Metaphosphoric acid(37267-86-0)Related Product Information
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