bitterant

A bitterant is a chemical that is added to a product to make it smell or taste bitter. Bitterants are commonly used as aversive agents to discourage the inhalation or ingestion of toxic substances.

==Examples of use== The addition of a bitterant to ethanol denatures the product. Bitterants are used in antifreeze to prevent pet and child poisonings. It is required by law in some places (France, Oregon, etc.). Gas dusters often use a bitterant to discourage inhalant abuse, although this can cause problems for legitimate users. The bitterant not only leaves a bitter flavor in the air, but also leaves a bitter residue on objects, like screens and keyboards, that may transfer to hands and cause problems (such as when eating). Similarly, the inclusion of bitterants such as 5% mustard oil in products containing inhalants like toluene have been mandated in some jurisdictions, namely in the Philippines where contact cement abuse by groups such as Rugby boys—a collective term for destitute children and youths addicted to Rugby brand cement by Bostik and similar products—are rampant. Game cartridges for the Nintendo Switch are coated with denatonium as a safety feature to deter small children from ingesting them. Some button cell batteries manufactured by Duracell are coated with a bitterant to discourage accidental ingestion by children.