Potassium tetraiodomercurate(II)

Potassium tetraiodomercurate(II)
Names
	IUPAC name potassium tetraiodidomercurate(II)
	Other names potassium mercuric iodide, ; Nessler's reagent (principal component)
Identifiers
CAS Number	7783-33-7 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:51568 ;
ChemSpider	22948 ;
ECHA InfoCard	100.029.082
EC Number	231-990-4;
PubChem CID	15980736;
UNII	7N83S6IU0F ;
UN number	3287
CompTox Dashboard (EPA)	DTXSID30893684 ;
	InChI InChI=1S/Hg.4HI.2K/h;41H;;/q+2;;;;;2+1/p-4 Key: OPCMAZHMYZRPID-UHFFFAOYSA-J ;
	SMILES [K+].[K+].I[Hg-2](I)(I)I;
Properties
Chemical formula	K2[HgI4]
Molar mass	786.406 g·mol−1
Appearance	yellow crystals
Odor	odorless
Density	4.29 g/cm3
Solubility in water	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). verify (what is ?) Infobox references

Potassium tetraiodomercurate(II) is an inorganic compound with the chemical formula K₂[Hg I₄]. It consists of potassium cations and tetraiodomercurate(II) anions. It is the active agent in Nessler's reagent, used for detection of ammonia.

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