Heptanoic acid

Heptanoic acid (CAS 111-14-8) is a seven-carbon saturated fatty acid, also known as enanthic acid, heptylic acid, and heptoic acid. It carries the FEMA designation 3348 and is not assigned an E-code for direct food use in the EU. It is commercially available as a neat liquid under these trade names across European markets.

In food and flavour applications, heptanoic acid contributes characteristic rancid and fruity top notes at controlled concentrations, functioning as a flavorant and acidulant. In industrial chemistry, it serves as a building block for ester synthesis and metallic salt production, where its carboxyl group reacts with alcohols or metal oxides to form lubricant additives and catalysts. It also acts as a surfactant precursor through esterification.

Heptanoic acid is supplied in technical and flavour-grade forms, with FCC-grade material available for food and fragrance use. It falls under REACH registration requirements within the EU (EC 203-838-7) and is classified under HS code 29159000. Typical packaging includes drums and IBCs for bulk procurement.