Chemical elements
  Bismuth
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Bismuth Trihydride
      Bismuth Trifluoride
      Bismuthyl Fluoride
      Bismuth Trichloride
      Bismuth Oxychloride
      Bismuth Chlorate
      Bismuthyl Perchlorates
      Bismuth Thiochloride
      Bismuth Selenochloride
      Bismuth Dibromide
      Bismuth Tribromide
      Bismuth Oxybromide
      Bismuth Thiobromide
      Bismuth Diiodide
      Bismuth Triiodide
      Bismuth Oxyiodide
      Bismuth Iodate
      Bismuth Thioiodide
      Bismuth Monoxide
      Bismuth Trioxide
      Bismuth Hydroxide
      Bismuth Tetroxide
      Bismuth Pentoxide
      Bismuth Hexoxide
      Bismuth Monosulphide
      Bismuth Trisulphide
      Bismuth Sulphites
      Bismuth Sulphate
      Bismuth Thiosulphates
      Bismuth Triselenide
      Bismuth Chromite
      Bismuth Nitride
      Bismuthyl Nitrite
      Normal Bismuth Nitrate
      Basic Bismuth Nitrate
      Bismuth Phosphide
      Bismuth Hypophosphite
      Bismuth Phosphite
      Bismuth Orthophosphate
      Bismuth Pyrophosphate
      Bismuth Thiophosphate
      Bismuth Arsenide
      Bismuth Arsenite
      Bismuth Arsenate
      Bismuth Carbonate
      Bismuth Cyanides
      Bismuth Thiocyanate
      Bismuth Chromothiocyanate
      Bismuth Orthosilicate
    Detection and Estimation

Bismuth Hypophosphite, Bi(H2PO2)3.H2O






Bismuth Hypophosphite, Bi(H2PO2)3.H2O, is obtained as a white crystalline powder by the action of potassium or barium hypophosphite upon a solution of bismuth nitrate. It is decomposed very readily by heat, phosphine being evolved at temperatures a little above 100° C. At higher temperatures some metallic bismuth is formed, and the reaction may possibly be represented by the equation

3Bi(H2PO2)3 = 2Bi + Bi(PO3)3 + 6P + 9H2O

It is also readily decomposed by water.

The use of bismuth hypophosphite in conjunction with hydrogen peroxide has been suggested for the quantitative separation of bismuth from other metals.

A basic hypophosphite, BiO.H2PO2, has also been described as resulting from the action of bismuthyl hydroxide, BiO.OH, upon hypophosphorous acid. It also is unstable and appears to resemble closely the normal hypophosphite.


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