Pentadecanal is primarily used in the fragrance and flavor industry due to its unique waxy, floral, and musky scent. It serves as a key ingredient in the formulation of perfumes, colognes, and scented products, adding depth and complexity to floral and woody compositions. Additionally, it is employed in the creation of flavoring agents for food and beverages, enhancing aromatic profiles with its subtle, natural undertones. Its stability and distinct aroma make it a valuable component in personal care products like lotions, soaps, and candles, where it contributes to long-lasting fragrance. In research, pentadecanal is studied for its potential role in chemical signaling and its interactions in biological systems.