Substrates such as fabrics may be bleached in an aqueous solution containing the thiadiazole and a peroxygen compound....http://www.google.com/patents/US5753599?utm_source=gb-gplus-sharePatent US5753599 - Bleaching composition comprising peroxygen compound, thiadiazole dioxide oxygen transfer agentAdvanced Patent SearchPublication numberUS5753599 APublication typeGrantApplication numberUS 08/760,1