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Aversive agent

Wikipedia contributorsAdapted for Fathomly · View authors
1 min read
Source updated November 18, 2025

Aversive agents are unpleasantly flavored substances added to poisonous household goods to discourage children and animals from consuming them. Aversive agents are not intended to be harmful, only unpleasant. For example, to prevent children from consuming poisonous anti-freeze, which has a sweet flavor due to the ethylene glycol, an aversive agent is added, which gives the anti-freeze an unpleasant taste. There are two primary classes of aversive agents: bitterants, chemicals producing a bitter flavor, and pungent agents, chemicals producing an unpleasantly spicy flavor.

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This article is adapted from the Wikipedia article “Aversive agent”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

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Related topics

Denaturation (food)

Denaturation is the process by which foods or liquids are made unpleasant or dangerous to consume; it is done by adding a substance known as a denaturant. Aversive agents, primarily bitterants and pungent agents, are often used to produce an unpleasant flavor.

Adulterant

An adulterant is a substance discreetly added to another that may compromise its safety or effectiveness. Consumable products, such as food, cosmetics, pharmaceuticals and fuels, are frequently adulterated to reduce the cost or difficulty of production without the knowledge of the buyer, allowing the product to be sold at the same price as a chemically pure equivalent.

Denatonium

Denatonium is an organic ion and one of the bitterest chemical compounds known, with bitterness thresholds of 0.05 ppm for the benzoate and 0.01 ppm for the saccharinate. Commercially, it is usually available in salts such as denatonium benzoate or as denatonium saccharinate (BITTERANT-s).