Potassium tetraiodomercurate(II)
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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]
Quick Facts Names, Identifiers ...
Names | |
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IUPAC name
potassium tetraiodidomercurate(II) | |
Other names
potassium mercuric iodide, Nessler's reagent (principal component) | |
Identifiers | |
3D model (JSmol) |
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ChEBI | |
ChemSpider |
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ECHA InfoCard | 100.029.082 |
EC Number |
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PubChem CID |
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UNII | |
UN number | 3287 |
CompTox Dashboard (EPA) |
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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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