Free chlorine is the active, disinfecting form of chlorine in water (hypochlorous acid HOCl and the hypochlorite ion OCl-); total chlorine, on the other hand, is the sum of free chlorine and already bound chlorine (chloramines). In short: free chlorine disinfects, bound chlorine is largely consumed – total chlorine encompasses both. Note / Disclaimer: The chemical […] shown on these pages















