Zinc iodide

Zinc iodide is a chemical compound. Its chemical formula is ZnI2. It contains zinc and iodide ions.
Properties.
Zinc iodide is a colorless solid. It dissolves in water. It reacts with bases to make zinc hydroxide. It is a reducing agent. When it is oxidized it makes iodine.
Preparation.
It is made by reacting zinc with iodine. 
Uses.
It is opaque (not clear) to X-rays. It can be used as a stain in microscope slides.