What is another word for oxidation-reduction indicator?
Pronunciation: [ˌɒksɪdˈe͡ɪʃənɹɪdˈʌkʃən ˈɪndɪkˌe͡ɪtə] (IPA) 
An oxidation-reduction indicator is a substance that changes color depending on the presence of oxidizing or reducing agents. It plays an important role in chemistry experiments and is used to determine whether a reaction is oxidative, reductive, or neutral. Synonyms for the term include redox indicator, oxidation-reduction dye, and redox dye. These substances are often organic compounds that contain a chromophore capable of undergoing a reversible change in its oxidation state. Some common examples of redox indicators include phenolphthalein, which turns from colorless to pink in the presence of a reducing agent, and methylene blue, which turns blue in the presence of an oxidizing agent.
