Gamma undecalactone is not a real aldehyde, but a lactone compound. It is colorless to light yellow viscous liquid with strong peach aroma. It is an important lactone perfume. It is often used in Osmanthus fragrans, jasmine, gardenia, lily of the valley, orange flower, white rose, lilac, acacia, etc Make good ingredients for peaches, muskmelon, Mei Zi, apricot, cherry, Osmanthus fragrans and other food flavors. It is almost insoluble in water, dissolved in ethanol and most common organic solvents, and can be widely used in daily flavors and food flavors.