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Lead(II) iodide

Lead(II) iodide

Other names	Lead diiodide, lead iodide
Identifiers
CAS number	10101-63-0
Properties
Molecular formula	PbI₂
Molar mass	461.05 g/mol
Density	6.16 g/cm³
Melting point	403 °C
Boiling point	872 °C
Solubility in other solvents	1 g in 1350 mL cold water 1 g in 230 mL hot water
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Lead (II) iodide (Pb I₂) is a toxic, yellowish solid. In its crystalline form it is used as a detector material for high energy photons including x-rays and gamma rays. It is also known as plumbous iodide. The CAS registry number is 10101-63-0. Its molecular weight is 461.05 g.mol^-1.

Additional recommended knowledge

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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.^[1]

Lead iodide is formed via precipitation by mixing lead(II) nitrate and potassium iodide:

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

References

^ 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

Category: Iodides