Potassium tetraiodomercurate(II)

Potassium tetraiodomercurate(II)
Names
IUPAC name
potassium tetraiodidomercurate(II)
Other names
potassium mercuric iodide,
Nessler's reagent (principal component)
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.029.082 Edit this at Wikidata
EC Number
  • 231-990-4
UNII
UN number 3287
  • InChI=1S/Hg.4HI.2K/h;4*1H;;/q+2;;;;;2*+1/p-4 ☒N
    Key: OPCMAZHMYZRPID-UHFFFAOYSA-J ☒N
  • [K+].[K+].I[Hg-2](I)(I)I
Properties
K2[HgI4][1]
Molar mass 786.406 g·mol−1
Appearance yellow crystals
Odor odorless
Density 4.29 g/cm3
very soluble
Solubility soluble in alcohol, ether, acetone
Hazards
Safety data sheet (SDS) External MSDS for Nessler's reagent
Related compounds
Other anions
 Mercury(II) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium tetraiodomercurate(II) is an inorganic compound with the chemical formula K2[HgI4]. It consists of potassium cations and tetraiodomercurate(II) anions. It is the active agent in Nessler's reagent, used for detection of ammonia.[2]

  1. ^ Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. p. 4-82. ISBN 978-1-4200-9084-0.
  2. ^ Vogel, Arthur I.; Svehla, G. (1979), Vogel's Textbook of Macro and Semimicro Qualitative Inorganic Analysis (5th ed.), London: Longman, ISBN 0-582-44367-9 – via the Internet Archive