Definition
The top note is the first impression of a fragrance, perceived immediately after application as the alcohol begins to evaporate and the most volatile aromatic compounds are released. The classical top note palette includes citrus essences (bergamot, lemon, lime, mandarin, neroli), aldehydes, light green notes, and hesperidic materials (Société Française des Parfumeurs, accessed 2026-05-27).
The top note is the most important phase for retail counter impressions, which is why many commercial fragrances are engineered with an appealing, accessible opening even when the heart and base are less conventional.
In composition
Perfumers distinguish between top notes that naturally evaporate (a citrus simply disappears) and structural openings that transition deliberately into the heart. Skilled composition ensures that the transition from top to heart feels seamless rather than abrupt.
In niche perfumery, top note conventions are frequently subverted: some houses open with base-note materials (resin-first structures), others use the top note as the entire composition (transparent single-material openings that dry down to near-skin musks). Testing on skin rather than on a smelling strip is essential to evaluate a full composition (Basenotes wiki, accessed 2026-05-27).