Redox Indicator - PH Dependent Redox Indicators

PH Dependent Redox Indicators

Indicator E0, V

at pH=0

 E0, V

at pH=7

 Color of

Oxidized form

 Color of

Reduced form
Sodium 2,6-Dibromophenol-indophenol

or Sodium 2,6-Dichlorophenol-indophenol

 +0.64 V +0.22 V blue colorless
Sodium o-Cresol indophenol +0.62 V +0.19 V blue colorless
Thionine (syn. Lauth's violet) +0.56 V +0.06 V violet colorless
Methylene blue +0.53 V +0.01 V blue colorless
Indigotetrasulfonic acid +0.37 V -0.05 V blue colorless
Indigotrisulfonic acid +0.33 V -0.08 V blue colorless
Indigo carmine

(syn. Indigodisulfonic acid

 +0.29 V -0.13 V blue colorless
Indigomono sulfonic acid +0.26 V -0.16 V blue colorless
Phenosafranin +0.28 V -0.25 V red colorless
Safranin T +0.24 V -0.29 V red-violet colorless
Neutral red +0.24 V -0.33 V red colorless

Read more about this topic:  Redox Indicator

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