<unk> is used to treat thallium poisoning or radioactive caesium poisoning. It may also be used for exposure to radioactive material until the underlying type is determined. Often it is given with mannitol or sorbitol to increase the speed it moves through the intestines.<unk> is also used to detect hemosiderin in urine to confirm a diagnosis of G6PD deficiency. Thallium poisoning For thallium it may be used in addition to gastric lavage, forced diuresis, and hemodialysis. It is given until the amount of thallium in the urine drops to below 0.5 mg per day. Caesium poisoning It is specifically only used for radioactive caesium poisoning when the caesium has entered the body either by swallowing or breathing it in.
Prussian blue 
Metacresol purple
Sucrosomial iron
SeHCAT
Toxidrome
Hemichrome
Tricresyl phosphate
Selenium disulfide