Thallium(I) iodide
Thallium(I) iodide, also known as thallous iodide, is a chemical compound. Its chemical formula is TlI. It has thallium and iodide ions in it. The thallium is in its +1 oxidation state.
Properties
Thallium(I) iodide is a yellow solid. It does not dissolve in water. It turns red when heated gently. It is a reducing agent. It is very toxic like all thallium compounds.
Preparation
It is made by reacting thallium with iodine or hydroiodic acid or by reacting any soluble thallium salt like thallium(I) sulfate with any iodide.
Uses
Thallium(I) iodide is used in mercury-vapor lamps. It is also used in a detector of radiation.