Characteristic

 

Zinc iodide is a chemical compound of zinc and iodine, ZnI₂. The anhydrous form is white and readily absorbs water from the atmosphere. 

Chemical formula：ZnI₂

Molar mass：319.22 g/mol

Appearance：white solid

Density：4.74 g/cm³

Melting point：446 °C (835 °F; 719 K)

Boiling point：1,150 °C (2,100 °F; 1,420 K) decomposes

Solubility in water：450 g/100mL (20 °C)

Magnetic susceptibility (χ)：−98.0·10⁻⁶ cm³/mol

Crystal structure：Tetragonal, tI96

 

Application

 

Zinc iodide is often used as an x-ray opaque penetrant in industrial radiography to improve the contrast between the damage and intact composite.n conjunction with osmium tetroxide ZnI2 is used as a stain in electron microscopy.