Trans-2-Undecenal is widely used in the fragrance and flavor industry due to its strong, citrus-like, and waxy odor. It is commonly incorporated into perfumes, colognes, and other scented products to impart a fresh, green, and slightly fatty aroma. In food flavoring, it is utilized to enhance or mimic citrus notes in beverages, candies, and baked goods. Additionally, it serves as a key ingredient in the formulation of household cleaning products and air fresheners, where its pleasant scent helps mask unpleasant odors. Its versatility and distinctive aroma make it a valuable component in various consumer products.