dichlorophenolindophenol is a blue dye that is decolorized
Biochem/physiol Actions. 2,6-dichlorophenolindophenol sodium salt is a redox dye commonly used as a monitor of the light reactions in photosynthesis because it is an electron acceptor that is blue when oxidized and colorless when reduced.It is part of the Hill reagents family.his reaction is reversible, as colorless DCPIP can be reoxidized to blue. 2,6-dichlorophenolindophenol (DCPIP) is used as a substitute for NADP+. The dye changes color when it is reduced, due to its chemical structure.