丁基羟基茴香醚（英语：Butylated hydroxyanisole，简称BHA）是一种抗氧化剂，为两种同分异构体2-叔丁基-4-羟基茴香醚和3-叔丁基-4-羟基茴香醚的混合物，E编码号是E320。它是通过对羟基茴香醚与叔丁醇（或异丁烯），或者2-叔丁基对苯二酚与硫酸二甲酯反应合成的。BHA的主要用途是在食品（包括动物食品）、食品包装、化妆品和石油产品中起到抗氧化剂和防腐剂作用。 除此之外，它还被用于药物的抗氧化，如异维甲酸、辛伐他汀等。

Butylated hydroxyanisole (BHA) is an antioxidant consisting of 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. It is a waxy solid used as a food additive with the E number E320. The primary use for BHA is as an antioxidant and preservative in food, food packaging, animal feed, cosmetics, rubber, and petroleum products. BHA also is commonly used in medicines, such as isotretinoin, lovastatin, and simvastatin, among others.