Heptadecanoyl chloride is primarily used in organic synthesis as a key reagent for introducing the heptadecanoyl group into various molecules. It is commonly employed in the production of surfactants, emulsifiers, and lubricants, where its long hydrocarbon chain enhances the hydrophobic properties of the final product. Additionally, it serves as an intermediate in the synthesis of specialty chemicals, including pharmaceuticals and agrochemicals, where it aids in modifying the solubility or stability of active ingredients. In the field of materials science, it is utilized to create coatings and polymers with specific surface properties, such as water repellency or improved adhesion. Its reactivity with alcohols and amines makes it valuable for producing esters and amides, which are essential in various industrial applications.