Mercury(I) iodide

Mercury(I) iodide
Spacefil model of crystalline mercury(I) iodide
Names
IUPAC name
Dimercury diiodide
Other names
Mercury(I) iodide
Mercurous iodide
Red mercury
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.035.811 Edit this at Wikidata
EC Number
  • 239-409-6
UNII
UN number 1638
  • InChI=1S/2Hg.2HI/h;;2*1H/q2*+1;;/p-2
    Key: NDKKKEPYKOOXLG-UHFFFAOYSA-L
  • I[Hg][Hg]I
Properties
Hg
2
I
2
Molar mass 654.99 g mol−1
Appearance Dark yellow, opaque crystals
Odor Odourless
Density 7.7 g mL−1
5.2×10−29[1]
−41.5·10−6 cm3/mol
Thermochemistry
241.47 J K−1 mol−1
−119.09 kJ mol−1
Hazards
GHS labelling:
GHS06: Toxic GHS08: Health hazard GHS09: Environmental hazard
Danger
H300, H310, H330, H373, H410
P260, P273, P280, P284, P301+P310
Related compounds
Other anions
Mercury(I) bromide
Mercury(I) chloride
Mercury(I) fluoride
Related compounds
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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Mercury(I) iodide is a chemical compound of mercury and iodine. The chemical formula is Hg2I2. It is photosensitive and decomposes easily to mercury and HgI2.

  1. ^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–189. ISBN 978-1138561632.