oxidation-reduction indicator

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• oxidation-reduction indicator — noun an indicator that shows a reversible color change between oxidized and reduced forms • Hypernyms: ↑indicator …   Useful english dictionary

• indicator — 1. In chemical analysis, a substance that changes color within a certain definite range of pH or oxidation potential, or in any way renders visible the completion of a chemical reaction; e.g., litmus, phenolsulfonphthalein. 2 …   Medical dictionary

• chemical indicator —       any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow …   Universalium

• Redox indicator — A redox indicator (also called an oxidation reduction indicator) is an indicator that undergoes a definite color change at a specific electrode potential. The requirement for fast and reversible color change means that the oxidation reduction… …   Wikipedia

• Oxidation state — Not to be confused with Oxidation number. In chemistry, the oxidation state is an indicator of the degree of oxidation of an atom in a chemical compound. The formal oxidation state is the hypothetical charge that an atom would have if all bonds… …   Wikipedia

• Chemical oxygen demand — In environmental chemistry, the chemical oxygen demand (COD) test is commonly used to indirectly measure the amount of organic compounds in water. Most applications of COD determine the amount of organic pollutants found in surface water (e.g.… …   Wikipedia

• resazurin — A blue compound used as a redox indicator in the reductase test of milk and also as a pH indicator (orange at 3.8, violet at 6.5). * * * res·azur·in rez azh ə rən n …   Medical dictionary

• methylene blue — A basic dye easily oxidized to azure, with dye mixtures; used in histology and microbiology, to stain intestinal protozoa in wet mount preparations, to track RNA and RNase in electrophoresis, and as an antidote for methemoglobinemia; its …   Medical dictionary

• methylene blue — noun a dark green dye used as a stain, an antiseptic, a chemical indicator, and an antidote in cyanide poisoning • Syn: ↑methylthionine chloride • Hypernyms: ↑stain, ↑thiazine * * * noun Usage: sometimes capitalized M&B : a basic dye of the… …   Useful english dictionary

• methylene blue — noun Date: circa 1890 a basic thiazine dye C16H18ClN3S•3H2O used especially as a biological stain, an antidote in cyanide poisoning, and an oxidation reduction indicator …   New Collegiate Dictionary

• methylene blue — Chem., Pharm. a dark green, crystalline compound, C16H18ClN3S, that dissolves in water to form a deep blue solution: used chiefly as a dye, as a bacteriological and biological stain, and as an antidote for cyanide poisoning. Also called… …   Universalium