Potassium hexachloroplatinate

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Potassium hexachloroplatinate
Potassium hexachloroplatinate.png
六氯合铂(IV)酸钾 CP.jpg
CAS number 16921-30-5 YesY
PubChem 61856
RTECS number TP1650000
Jmol-3D images Image 1
Molecular formula K2PtCl6
Molar mass 485.99 g/mol
Appearance orange to yellow solid
Density 3.344 g/cm3
Melting point 250 °C (482 °F; 523 K) (decomposes)
EU classification Toxic (T)
Flash point 250 °C (482 °F; 523 K)
Related compounds
Other anions Potassium tetrachloroplatinate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Potassium hexachloroplatinate, an inorganic compound, is an example of a comparatively insoluble potassium salt.

The precipitation of this compound from solutions of hexachloroplatinic acid was formerly used for the determination of potassium by gravimetric analysis.[1]

Potassium hexachloroplatinate may be reduced by hydrazine dihydrochloride to give the corresponding tetrachloroplatinate salt.[2]


  1. ^ G. F. Smith, J. L. Gring (1933). "The Separation and Determination of the Alkali Metals Using Perchloric Acid. V. Perchloric Acid and Chloroplatinic Acid in the Determination of Small Amounts of Potassium in the Presence of Large Amounts of Sodium". J. Am. Chem. Soc. 55 (10): 3957–3961. doi:10.1021/ja01337a007. 
  2. ^ Keller, R. N.; Moeller, T. (1963). "Potassium Tetrachloroplatinate(II)". Inorg. Synth. Inorganic Syntheses 7: 247–250. doi:10.1002/9780470132333.ch79. ISBN 978-0-470-13233-3.