2000 Sept. {Evaluating RfC, RfD, carcinogenicity. Includes **injection report.} "what exists in water or the stomach is a mixture of these chemical species (i.e., chlorine dioxide, chlorite, chlorate) and possibly their reaction products with the gastrointestinal contents." "[after gavage dosing of rats] it was not clear from these reports whether the parent chlorine dioxide itself or the chlorite, chlorate, or chloride ion degradation products were absorbed"