Title: Zinc Iodide

CAS Registry Number: 10139-47-6

Molecular Formula: I2Zn

Molecular Weight: 319.22

Percent Composition: I 79.51%, Zn 20.49%

Line Formula: ZnI2

Literature References: Usually contains at least 98% ZnI2.

Properties: White or almost white, odorless, hygroscopic, granular powder; sharp, saline taste; becomes brown on exposure to air and light, due to liberation of iodine. d25 4.74; mp ~446°; bp ~625° with decompn. One gram dissolves in 0.3 ml water, 0.2 ml boiling water, 2 ml glycerol; freely sol in alcohol, ether. The aq soln is acid to litmus; pH about 5. Keep well closed and protected from light.

Melting point: mp ~446°

Boiling point: bp ~625° with decompn

Density: d25 4.74

Therap-Cat: Topical antiseptic, astringent.

Keywords: Astringent.