Chemical elements
  Antimony
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
    Compounds
      Antimony Trihydride
      Antimony Trifluoride
      Antimony Pentafluoride
      Antimony Trichloride
      Oxychlorides of Tervalent Antimony
      Antimony Tetrachloride
      Antimony Pentachloride
      Chloroantimonic Acids
      Antimonyl Perchlorate
      Antimony Tribromide
      Antimony Oxybromides
      Antimony Pentabromide
      Antimony Triiodide
      Antimony Oxyiodide or Antimonyl Iodide
      Antimony Thioiodide
      Mixed Antimony Halides
      Antimony Trioxide
      Hydrated Antimony Trioxide
      Antimonites
      Antimony Tetroxide or Antimony Dioxide
      Antimony Pentoxide
      Antimony Trisulphide
      Antimony Pentasulphide
      Thioantimonates
      Normal Antimony Sulphate
      Potassium Stibiothiosulphate
      Antimony Selenate
      Antimony tritelluride
      Antimony Phosphide
      Antimonyl Dihydrogen Phosphite
      Antimony Phosphate
      Antimony Pyrophosphate
      Antimony Thiophosphate
    PDB 1exi-2xqa

Potassium Stibiothiosulphate, K3Sb(S2O3)3






Potassium Stibiothiosulphate, K3Sb(S2O3)3, forms silk-like, needle-shaped crystals resembling asbestos. It is very soluble in water, but decomposes on boiling, with formation of the orange-red oxysulphide Sb6O3S6. The rubidium and barium salts have also been obtained. The salts of sodium, calcium and strontium exist only in solution. The potassium salt appears to have the constitution represented by the formula Sb[S.SO2.OK]3.

By the hydrolysis of these alkali stibiothiosulphates fairly stable sols of antimony pentasulphide may be obtained.


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