The water soluble sodium salt of a small-molecule bis(thio-hydrazide amide) with oxidative stress induction, pro-apoptotic, and potential antineoplastic activities. Elesclomol induces oxidative stress, creating high levels of reactive oxygen species (ROS), such as hydrogen peroxide, in both cancer cells and normal cells. Because tumor cells have elevated levels of ROS compared to normal cells, the increase in oxidative stress beyond baseline levels elevates ROS beyond sustainable levels, exhausting tumor cell antioxidant capacity, which may result in the induction of the mitochondrial apoptosis pathway. Normal cells are spared because the increase in the level of oxidative stress induced by this agent is below the threshold at which apoptosis is induced. OR A drug used in the treatment of skin cancer that has spread. It is also being studied in the treatment of other types of cancer. It increases the amount of harmful oxygen molecules in cells and may kill cancer cells. It may also help other drugs kill cancer cells. It is a type of oxidative stress inducer.