Butylated hydroxyanisole - Revision history

Prab at 19:29, 16 March 2025

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'''Butylated hydroxyanisole''' ('''BHA''') is a synthetic [[antioxidant]] used in food and cosmetic products to prevent oxidation and extend shelf life. It is a white or slightly yellow waxy solid with a faint characteristic odor.

==Chemical Structure==
BHA is a mixture of two isomeric organic compounds, 2-tert-butyl-4-hydroxyanisole and 3-tert-butyl-4-hydroxyanisole. It is prepared from [[4-methoxyphenol]] and [[isobutylene]].

==Uses==
BHA is primarily used as an antioxidant and preservative in food, food packaging, cosmetics, rubber, and petroleum products. In foods, it prevents fats and oils from becoming rancid and maintains their nutritional value. In cosmetics, it prevents the oxidation of unsaturated oils, which can cause rancidity and off-odors.

==Safety and Regulation==
The [[U.S. Food and Drug Administration]] (FDA) has classified BHA as a generally recognized as safe (GRAS) substance. However, the [[International Agency for Research on Cancer]] (IARC) has classified BHA as a possible human carcinogen.

==Environmental Impact==
BHA can enter the environment through the disposal of products containing it. It is not easily biodegradable and can accumulate in aquatic organisms.

==See Also==
* [[Butylated hydroxytoluene]]
* [[Propyl gallate]]
* [[Tertiary butylhydroquinone]]

==References==
<references />

[[Category:Food additives]]
[[Category:Antioxidants]]
[[Category:Phenol antioxidants]]
[[Category:E-number additives]]
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