Hydromethylthionine

Hydromethylthionine (Leukomethylene blue) is a highly active photochemical reagent, particularly in its interaction with dissolved oxygen. Its photochemical activity is primarily regulated by the reaction of its triplet state with dissolved oxygen. Upon exposure to ultraviolet light, the triplet state of Hydromethylthionine reacts with dissolved oxygen, producing Methylene Blue and hydrated hydrogen ions. It is utilized in semiconductor photocatalysis for the photodegradation of model pollutants and in the study of indicators in chemical analysis.