World Library  
Flag as Inappropriate
Email this Article

Lead(II) iodide

Article Id: WHEBN0000766244
Reproduction Date:

Title: Lead(II) iodide  
Author: World Heritage Encyclopedia
Language: English
Subject: Plumbocene, Lead(II) bromide, Lead(II) sulfate, Lead, Compounds of lead
Collection: Iodides, Lead Compounds, Metal Halides, Semiconductor Materials
Publisher: World Heritage Encyclopedia

Lead(II) iodide

Lead(II) iodide
Lead(II) iodide
Other names
Plumbous iodide
ChemSpider  Y
Jmol-3D images Image
Molar mass 461.01 g/mol
Appearance bright yellow powder
Odor odorless
Density 6.16 g/cm3
Melting point 402 °C (756 °F; 675 K)
Boiling point 872 °C (1,602 °F; 1,145 K)
0.044 g/100 mL (0 °C)
0.0756 g/100 mL (20 °C)[1]
0.41 g/100 mL (100 °C)[2]
4.41 x 10−9 (20 °C)
Solubility insoluble in ethanol, cold HCl
soluble in alkalis, KI solution
Rhombohedral, hP3
P-3m1, No. 164
Repr. Cat. 1/3
Harmful (Xn)
Dangerous for the environment (N)
R-phrases R50/53
S-phrases S53, S45, S60, S61
NFPA 704
Flash point Non-flammable
Related compounds
Other anions
Lead(II) fluoride
Lead(II) chloride
Lead(II) bromide
Other cations
Tin(II) iodide
Related compounds
Thallium(I) iodide
Bismuth(III) iodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 N  (: Y/N?)

Lead(II) iodide (PbI2) or plumbous iodide is a bright yellow solid at room temperature, that reversibly becomes brick red by heating. In its crystalline form it is used as a detector material for high energy photons including x-rays and gamma rays.

Lead iodide is toxic due to its lead content. In the nineteenth century it was used as an artists' pigment under the name Iodine Yellow, but it was too unstable to be useful.[3]


  • Preparation 1
  • Properties 2
  • See also 3
  • References 4
  • External links 5


Lead iodide can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and potassium iodide:

Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)

The yellow precipitate dissolves in an excess of KI solution, forming a colourless solution of the tetraiodoplumbate:[4]

Pb(I2)(s) + 2KI(aq) ⇄ K2PbI4(aq)


It is sparingly soluble in cold water but quite soluble in hot water, yielding a colorless solution; on cooling it crystallizes as yellow hexagonal platelets.

Lead(II) iodide precipitates when solutions of potassium iodide and lead(II) nitrate are combined
Experiment "golden rain" where iodide of lead (II) was recrystallized from hot solution by cooling, forming crystals of golden-yellow.

See also


  1. ^ NIST-data review 1980
  2. ^ Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
  3. ^ Salter, Thomas W., Field’s Chromatography: or Treatise on Colours and Pigments as Used by Artists By George Field. An entirely new and practical edition revised, rewritten and brought down to the present time, 1869
  4. ^ Satya Prakash, Advanced Inorganic Chemistry Volume 1, 2006, ISBN 81-219-0263-0

External links

  • Toxic Substances Portal - Lead

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.