Potassium hexachloroplatinate

Potassium hexachloroplatinate

Identifiers
CAS Number	16921-30-5
Jmol interactive 3D	Image
PubChem	61856
RTECS number	TP1650000
SMILES Cl[Pt-2](Cl)(Cl)(Cl)(Cl)Cl.[K+].[K+]
Properties
Chemical formula	K2PtCl6
Molar mass	485.99 g/mol
Appearance	orange to yellow solid
Density	3.344 g/cm^3
Melting point	250 °C (482 °F; 523 K) (decomposes)
Solubility in water	0.89 g/100ml H2O (at 25 °C) [1]
Hazards
Safety data sheet	Oxford MSDS
EU classification (DSD)	Toxic (T)
Flash point	250 °C (482 °F; 523 K)
Related compounds
Other anions	Potassium tetrachloroplatinate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
verify (what is  ?)
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.^[2]

Potassium hexachloroplatinate may be reduced by hydrazine dihydrochloride to give the corresponding tetrachloroplatinate salt.^[3]

References

1. Grinberg, A. A.; Sibirskaya, V. V. (1967). "Solubility of hexammine and hexahalo platinum(IV) complexes". Zhurnal Neorganicheskoi Khimii 12: 2069–2071.
2. 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.
3. 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.