<unk>  (abbreviated<unk>  and its sodium salt (known as Unithiol) are chelating agents that form complexes with various heavy metals. They are related to<unk> l, which is another chelating agent. The synthesis of<unk>  was first reported in<unk> 956 by V. E. Petrunkin. The effects of<unk>  on heavy metal poisoning, including with polonium-210, were investigated in the following years.<unk>  was found to have some protective effect, prolonging the survival time. A study was undertaken of<unk>  use by workers involved in the production of a calomel skin bleaching lotion and in direct contact with mercurous chloride and that already showed elevated urine mercury levels. The sodium salt of<unk>  was found to be effective in lowering the body burden of mercury and in decreasing the urinary mercury concentration to normal levels.<unk>  administrated to a mercury poisoned animal model failed to remove the mercury from tissues and reduce the inorganic mercury burden in the brain. A<unk> 008 study reported a case of Stevens–Johnson syndrome (SJS), a potentially serious disease, in a child undergoing chelation therapy with<unk> ; the SJS resolved gradually after the chelation therapy was stopped. A<unk> 020 study found<unk>  to provide some benefits taken orally in mitigating effects from hemotoxic snakebites (using venom from saw-scaled vipers Viperidae Echis) in mouse models when given soon after exposure, suggesting its potential for repurposing as a prehospital treatment. Albulescu, L.; Hale, M.S.;Ainsworth, S.; Alsolaiss, J.; Crittenden, E.; Calvete, J.J.; Evans, C.; Wilkinson, M.C.; Harrison, R.A.; Kool, J.; Casewell, N.R. <unk> 020). "Preclinical validation of a repurposed metal chelator as an early-intervention therapeutic for hemotoxic snakebite". Science Translational Medicine, Vol<unk> 2, Issue 542, 8314 DOI:<unk> 0.1126/scitranslmed.aay8314
2,3-Dimercapto-1-propanesulfonic acid
Phytic acid
Dehydroascorbic acid
Sodium glycerophosphate
Carbonated water
Calcium fructoborate
Selenous acid
Glucuronic acid