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Aldehydes, one of the key aroma ingredient groups, have a considerable effect in both fragrances and flavors. Some of the first aldehydes to be used as synthetic molecules in a perfume were octanal, nonanal and decanal; they were used in the formulation of Chanel No. 5 by Chanel in 1921. The odor note of these aliphatic linear aldehydes is green-floral and “aldehydic,” usually described as the odor note of long-chain fatty aldehydes, e.g., fatty-sweaty, ironed laundry and sea water.
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