Redox Indicators

Merck provides high-quality redox indicators for a wide variety of applications. Redox indicators (or oxidation-reduction indicators) are used in laboratories to track redox reactions, to determine approximate redox potentials, and to indicate the endpoint of redox titrations.

Redox indicators are weak reductants or oxidizers whose reduced and oxidized forms have different colors. The color change occurs within a particular redox potential transition range that must encompass the redox potential of the equivalence point in the redox titration to be performed.

If an oxidizing volumetric solution is used, the redox potential of the indicator must be higher than the potential of the solution whereas in case of a reducing volumetric solution it must be lower. In Merck’s portfolio of redox indicators, you will certainly find the reagent with just the right parameters for your application.