Parahydroxyanisole

Parahydroxyanisole, also known as 4-hydroxyanisole or p-hydroxyanisole, is an organic aromatic compound with the formula C7H8O2. It consists of a benzene ring bearing a methoxy group and a hydroxy group in para positions relative to each other, making it a member of the class of methoxyphenols.

Production and occurrence: Parahydroxyanisole is typically produced synthetically by selective hydroxylation of anisole or from related phenyl ether precursors. It is mainly encountered as a chemical intermediate in fragrance and flavor chemistry and is not generally obtained as a significant natural product in amounts used industrially.

Uses: The compound serves as a chemical building block in organic synthesis and is used predominantly in the fragrance and flavor industries. As a relatively simple phenolic ether, it can be converted into a variety of more complex phenolic derivatives that contribute to scent and taste formulations.

Safety and regulatory: Like many phenols, parahydroxyanisole can be irritating to skin, eyes, and the respiratory tract at sufficient concentrations; appropriate personal protective equipment and ventilation are advised when handling. It should not be ingested, inhaled in concentrate form, or used without proper safeguards. Regulatory status and permissible concentrations vary by jurisdiction and use case, with standard chemical-safety practices applying in most contexts.