Infrared detectors
Cardiac studies

Thallium and its compounds have very little applications, being normally limited to commercial insecticides and rat poison. Thallium sulfate is an insipid and scentless compound, and is usually added to glycerin, sugar or water to eliminate small rodents and bugs. Thallium applications as a metallic alloy are also limited. The only important alloy is thallium-lead that is used in electric fuses. Thallium is also used as an addictive in special glasses, used in semiconductor protection, capacitors and other electronic devices, to protect them from oxidation and moisture.