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(Science: chemical) 2,3-dimercapto-1-propanol. An anti-gas warfare agent that is effective against lewisite (dichloro(2-chlorovinyl)arsine). It acts as a chelating agent and is used in the treatment of arsenic, gold, and other heavy Metal poisoning.

Pharmacological action: antidotes, chelating agents.

chemical name: 1-Propanol, 2,3-dimercapto-