4-Biphenylcarboxaldehyde

4-Biphenylcarboxaldehyde (CAS 3218-36-8), also known as 4-formylbiphenyl or 4-phenylbenzaldehyde, is an aromatic aldehyde consisting of a biphenyl backbone with a terminal aldehyde group. It carries no assigned E-code and is catalogued under EC 221-742-3. It is commercially handled as a flavour and fragrance intermediate.

In UV-curable printing inks and coatings, the aldehyde group absorbs UV radiation and generates radicals that initiate polymer crosslinking, reducing cure times. In personal care formulations, it contributes floral-aldehydic character to fragrance compositions. Researchers have also documented antimicrobial activity, attributed to the aldehyde group reacting with microbial membrane proteins.

This material is supplied as a crystalline powder and is subject to REACH registration requirements for EU-based importers and manufacturers. Buyers should confirm supplier documentation including SDS, certificate of analysis, and purity specification relevant to their application, whether cosmetic, food-contact, or industrial.