2 6 dichlorophenolindophenol solution July 8, 2019 16 32 64 128 2 6 dichlorophenol indophenol solution preparation 2 6- dichlorophenol indophenol solution 2 6-dichlorophenol-indophenol sodium salt dihydrate 2 6-dichlorophenolindophenol 2 6-dichloroindophenol 2 6-dichlorophenol-indophenol msds