Chloroplatinic acid

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Reddish brown light sensitive crystals. Chloroplatinic acid is used to make Platinum photographic prints, indelible ink, and mirrors. It is also used for platinizing Glass, Porcelain, and Pumice stone.

Synonyms and Related Terms

hydrogen hexachloroplatinate; acid platinic chloride; hexachloroplatinic acid; platinic chloride; platinum chloride


  • Inhalation and skin contact causes irritation and allergic reactions.
  • ThermoFisher:SDS

Physical and Chemical Properties

Soluble in water, ethanol, ether.

Composition H2PtCl6 - 6H2O
CAS 16941-12-1
Melting Point 60 C
Density 2.431 g/ml
Molecular Weight mol. wt. = 517.92
Boiling Point 115 C

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: Entry 7684
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979