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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