Dimercaprol is a chemical compound used in the treatment of mercury, lead, and gold poisoning. It is employed in the chelation therapy to rid the blood of these heavy metals, thus, removing the poisoning metals from the body tissue through renal excretion. Dimercaprol is injected into the blood stream intravenously. It is a colorless, viscous liquid, soluble in water. Formula: C3H8OS2.