Although 2:3-dimercaptopropanol (British AntiLewisite, BAL) was first introduced (Stocken & Thompson, 1941, 1946) as a local antidote for use after contamination of the skin with one of the arsenical vesicants, its application to the treatment of systemic arsenical poisoning in man made it desirable to obtain information concerning the distribution of thiols in the blood and urine after injecti...