Pyridinium chlorochromate is a salt of pyridinium and chlorochromic acid. It is used in organic chemistry as an oxidative agent. It was first used for the oxidation of primary and secondary alcohols to carbonyl compounds. Later it has found applications in the oxidation of organometallic compounds, reactions of deoximation, synthesis of unsaturated carbonyls, reactions of oxidative cationic cyclization and oxidation of activated carbon-carbon double bonds. Pyridinium chlorochromate was reported to be used as urine adulterant to conceal the detection of amphetamine-type substances and to produce false negative results for cocaine testing.