FragDNA / The Language of Scent / Foundations
What a Perfume Is Made Of
Foundations · 6 min
A finished perfume is a solution: between roughly 5% and 30% aromatic concentrate dissolved in ethanol, with a small amount of water and, usually, a UV filter and a colourant. Everything interesting is in that concentrate, and the concentrate is a mixture of somewhere between twenty and two hundred separate ingredients.
Those ingredients come from two places. Naturals are extracted from plants — occasionally, historically, from animals. Aromachemicals are single molecules, made in a factory. The distinction matters less than beginners assume, because a natural is not one smell; it is a crowd. Rose absolute contains several hundred identifiable compounds. Bergamot oil contains dozens. When a perfumer adds rose absolute, she is adding a whole chord at once, and she cannot easily remove one note from it.
An aromachemical is the opposite: one molecule, one behaviour, total control. Some are isolates, pulled out of a natural (vanillin was first made from pine bark; linalool can be fractioned from rosewood). Some exist in nature but are cheaper to synthesise. And some — Iso E Super, Calone, Galaxolide — have no natural counterpart at all. They are new smells, invented in a laboratory, and much of what a modern perfume smells like is them.
Extraction method changes the material as much as the plant does. Steam distillation produces an essential oil and works for robust materials: lavender, vetiver, cedar. Delicate flowers collapse under heat, so they are washed with solvent to produce a waxy concrete, which is then washed with alcohol to yield an absolute. Distilled rose (rose otto) and rose absolute smell audibly different — the otto lemony and clean, the absolute darker, jammier, more honeyed. Citrus peel is simply pressed.
The economics are brutal and they shape what you can smell. It takes roughly four tonnes of rose petals to make one kilogram of rose otto. Orris butter, from aged iris rhizomes, has run above €50,000 a kilogram. Real oud oil costs more than gold by weight. No mass-market fragrance can carry meaningful quantities of these, which is why the interesting question about any bottle is not "is it natural?" but "what did the perfumer spend the budget on?"
A very small number of houses work almost entirely in naturals, which is instructive precisely because it sounds so different — softer edges, shorter life on skin, less of the clean radiant lift that synthetics provide. Hearing that difference is the fastest way to understand what synthetics actually do.
Key terms
- Absolute
- A highly concentrated floral extract obtained with solvents rather than heat, used for materials too fragile to distil.
- Aromachemical
- A single aroma molecule produced synthetically, giving the perfumer precise control over one specific smell.
- Concentrate
- The undiluted aromatic mixture — the perfumer's actual composition — before it is dissolved in alcohol.
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