Anisaldehyde

Anisaldehyde is an aromatic aldehyde in which a methoxy group is attached to a benzene ring. The most common form is p-anisaldehyde, or 4-methoxybenzaldehyde, in which the methoxy substituent is para to the formyl group. The compound has structural isomers, including o-anisaldehyde (2-methoxybenzaldehyde) and m-anisaldehyde (3-methoxybenzaldehyde).

Physically, anisaldehyde is typically a colorless to pale yellow liquid with a characteristic sweet, anisic odor. It is soluble in many organic solvents and has limited water solubility. The molecular formula is C8H8O2, and its structure features a benzaldehyde backbone with a methoxy substituent.

Anisaldehyde is produced commercially by industrial routes that oxidize suitable anisole derivatives or related precursors to the corresponding benzaldehyde. It is not a major natural product but is widely manufactured for use in fragrances and flavorings. In perfumery, anisaldehyde contributes sweet, balsamic, and anise-like notes and is used as a fragrance ingredient or flavor enhancer in a variety of products. It also serves as an intermediate in the synthesis of dyes, pharmaceuticals, and other organic compounds.

Safety and handling considerations are typical of volatile aromatic aldehydes. Anisaldehyde can be an irritant to skin and eyes and should be handled with appropriate protective equipment in a well-ventilated area. It is flammable and should be stored away from heat sources and incompatible materials.