Products Supplements and chemical reagents Chemical reagents Cytochrome oxidase reagent (NNNN-tetramethyl-p-phenylenediamine dihydrochloride). C-064 Cytochrome oxidase reagent (NNNN-tetramethyl-p-phenylenediamine dihydrochloride). C-064 Categories Chemical reagents Product description catalogue number: C-064 Chemical reagent Pack size: 25 g, 5 g