Chx may refer to: Chamonix, a town in the French Alps Chancellor of the Exchequer Chicago Stock Exchange Charing Cross railway station (National Rail code) in London Chlorhexidine: A disinfectant and topical anti-infective agent used also as mouthwash to prevent oral plaque CHX, the IATA airport code for Changuinola "Capitán Manuel Niño" International Airport in Changuinola, Panama Cycloheximide, an inhibitor of protein biosynthesis in eukaryotic cells