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GEMET
General
Multilingual
Environmental
Thesaurus
catalyst
Definition

A substance whose presence alters the rate at which a chemical reaction proceeds, but whose own composition remains unchanged by the reaction. Catalysts are usually employed to accelerate reactions(positive catalyst), but retarding (negative) catalysts are also used.

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Scope note

Scope note is not available.

Concept URL: http://www.eionet.europa.eu/gemet/concept/1210