Copper(I) iodide

Copper(I) iodide
Copper(I) iodide
Names
IUPAC name
Copper(I) iodide
Other names
Cuprous iodide, marshite
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.795 Edit this at Wikidata
UNII
  • InChI=1S/Cu.HI/h;1H/q+1;/p-1 checkY
    Key: LSXDOTMGLUJQCM-UHFFFAOYSA-M checkY
  • InChI=1/Cu.HI/h;1H/q+1;/p-1
    Key: LSXDOTMGLUJQCM-REWHXWOFAV
  • [Cu]I
Properties
CuI
Molar mass 190.450 g·mol−1
Appearance White solid
Odor odorless
Density 5.67 g/cm3 [1]
Melting point 606 °C (1,123 °F; 879 K)
Boiling point 1,290 °C (2,350 °F; 1,560 K) (decomposes)
0.000042 g/100 mL
1.27 x 10−12 [2]
Solubility soluble in ammonia and iodide solutions
insoluble in dilute acids
Vapor pressure 10 mm Hg (656 °C)
−63.0·10−6 cm3/mol
2.346
Structure
zincblende
Tetrahedral anions and cations
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation markGHS09: Environmental hazard
Danger
H302, H315, H319, H335, H410
P261, P273, P305+P351+P338, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
1
0
Flash point Non-flammable
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 1 mg/m3 (as Cu)[3]
REL (Recommended)
 TWA 1 mg/m3 (as Cu)[3]
IDLH (Immediate danger)
 TWA 100 mg/m3 (as Cu)[3]
Safety data sheet (SDS) Sigma Aldrich
Related compounds
Other anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Copper(I) iodide is an inorganic compound with the chemical formula CuI. It is also known as cuprous iodide. It is useful in a variety of applications ranging from organic synthesis to cloud seeding.

Copper(I) iodide is white, but samples often appear tan or even, when found in nature as rare mineral marshite, reddish brown, but such color is due to the presence of impurities. It is common for samples of iodide-containing compounds to become discolored due to the facile aerobic oxidation of the iodide anion to molecular iodine.[4][5][6]

  1. ^ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.
  2. ^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 4–47. ISBN 978-1138561632.
  3. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).
  4. ^ George B. Kauffman, Lawrence W. Fang (1983). Copper(I) Iodide. Inorganic Syntheses. Vol. 22. p. 101. doi:10.1002/9780470132531.ch20.
  5. ^ "Verification".
  6. ^ "List of Minerals". 21 March 2011.