Abstract Perchlorate is a uniquely stable chemical described as an emerging thyroid disrupting agent that is presently detected in several terrestrial and aquatic matrices. The present study was undertaken to deoxygenate perchlorate to the chloride anion photolytically in the presence of dodecamethylcyclohexasilane (Me 2 Si) 6 1. It is found that photolysis of 1 in the presence of dry NaClO 4 in tetrahydrofuran (THF) at 254 nm leads to ...