Aldehydes

What Does It Smell Like?

Aldehydes smell like a crisp, almost electric freshness—imagine the sharp, waxy brightness of a newly opened bar of soap, or that clean snap you get when you peel the white pith from inside a lemon skin. There's a slightly soapy, almost metallic quality that's oddly luxurious and powdery. They're not quite fruity or citrus themselves, but rather the *idea* of cleanliness—the scent of polished surfaces and starched linen. Some find them slightly peppery or even a touch metallic, like touching a cool stainless steel sink on a bright morning.

Origin & History

Aldehydes are primarily synthetic creations, though some occur naturally in tiny amounts in citrus oils and rose. The first famous aldehyde, C12 (dodecyl aldehyde), was synthesised in the early 20th century. They revolutionised perfumery when Coco Chanel's "No. 5" (1921) featured them prominently—the first fragrance to use aldehydes as a major note, creating that distinctive soapy-clean character. Most are now industrially synthesised through chemical processes, making them affordable, stable, and consistent for mass-market perfumes.

In Perfumery

Aldehydes function as sparkling top notes that create immediate impact and luminosity. They amplify other notes, making florals brighter and citruses sharper. Perfumers use them as freshness amplifiers and to add an almost champagne-like effervescence. They're often the "wow" factor—that opening burst of clean, almost bubbly brightness before warmer notes emerge.

Pairs Beautifully With

Featured In 199 Fragrances