A spectrophotometric study of the formation and deprotonation of thioarsenite species in aqueous solution at 22 °C

The pKa's for the oxythioarsenous ionization reactions have also been estimated by analogy with those for the end member arsenous and thioarsenous acids. The data emphasize the important role of the simple arsenic(III) thioanions in defining the transport and redox chemistry of arsenic in sulfide-containing natural waters.