Silver iodide

Silver iodide is a chemical compound. Its chemical formula is AgI. It contains silver in its +1 oxidation state. It also contains iodide ions.
Properties.
Silver iodide is a yellow solid. It does not dissolve in water. It turns dark when light is shined on it. The darkening is caused by a chemical reaction. The silver iodide turns into silver and iodine.
Preparation.
It is made by reacting an iodide such as sodium iodide with silver nitrate.
Uses.
Silver iodide is sprinkled in clouds to make rain. It can also be used in photographic film.
Safety.
Silver iodide is toxic. It can stain skin. It is not as toxic as other silver compounds that dissolve in water. The iodide also is toxic.