Used primarily as an intermediate in organic synthesis, especially in the production of valeric acid and its derivatives. Commonly employed in fragrance formulations for perfumes and cosmetics due to its fruity, slightly floral odor. Also utilized in the manufacture of plasticizers and as a flavoring agent in food products, contributing apple-like or fruity notes. Plays a role in the synthesis of pharmaceuticals and agrochemicals where aldehyde functionality is required for chain elongation or functional group transformation.