Redox Indicator - PH Independent Redox Indicators

PH Independent Redox Indicators

Indicator E0, V Color of Oxidized form Color of Reduced form
2,2'-bipyridine (Ru complex) +1.33 V colorless yellow
Nitrophenanthroline (Fe complex) +1.25 V cyan red
N-Phenylanthranilic acid +1.08 V violet-red colorless
1,10-Phenanthroline (Fe complex) +1.06 V cyan red
N-Ethoxychrysoidine +1.00 V red yellow
2,2`-Bipyridine (Fe complex) +0.97 V cyan red
5,6-Dimethylphenanthroline (Fe complex) +0.97 V yellow-green red
o-Dianisidine +0.85 V red colorless
Sodium diphenylamine sulfonate +0.84 V red-violet colorless
Diphenylbenzidine +0.76 V violet colorless
Diphenylamine +0.76 V violet colorless
Viologen -0.43 V colorless blue

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