Glossary Term: Reagent

A substance used in a chemical reaction to detect, measure, examine, or produce other substances. A substance or mixture formula for use in chemical analysis or other reactions. A substance or compound that is added to a system in order to bring about a chemical reaction, or added to see if a reaction occurs. Although the terms reactant and reagent are often used interchangeably, a reactant is more specifically a substance that is consumed in the course of a chemical reaction. Solvents, although they are involved in the reaction, are usually not referred to as reactants. Similarly, catalysts are not consumed by the reaction, so are not described as reactants. In organic chemistry, reagents are compounds or mixtures, usually composed of inorganic or small organic molecules, that are used to effect a transformation on an organic substrate. Examples of organic reagents include the Collins reagent, Fenton’s reagent, and Grignard reagent. There are also analytical reagents which are used to confirm the presence of another substance. Examples of these are Fehling’s reagent, Millon’s reagent and Tollens’ reagent. When purchasing or preparing chemicals, reagent-grade describes chemical substances of sufficient purity for use in chemical analysis, chemical reactions or physical testing.

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Created: 2019-07-04 10:30:04 CDT (-0400)
Last modified: 2019-07-04 10:30:04 CDT (-0400)