2,3-Dimercapto-1-propanesulfonic acid (abbreviated DMPS) and its sodium salt (known as Unithiol) are chelating agents that form complexes with various heavy metals.

[2] The effects of DMPS on heavy metal poisoning, including with polonium-210, were investigated in the following years.

[3] A study was undertaken of DMPS 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.

[7] A 2020 study found DMPS 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.

"Preclinical validation of a repurposed metal chelator as an early-intervention therapeutic for hemotoxic snakebite".