Fragrance Notes Explained — Top, Heart & Base
Every fragrance unfolds over time — the bright burst when you first spray, the rich character that develops after 30 minutes, and the warm lingering scent that stays for hours. This evolution is structured through three layers called notes. Understanding them is the first step to reading any fragrance, designing your own compositions, or simply choosing perfumes more confidently.
Top Notes (0–30 minutes)
Top notes are the first impression — the molecules you smell the instant a fragrance is applied. They evaporate fastest because they have the smallest molecular weight and highest volatility. Top notes are designed to be attention-grabbing and fresh, creating the initial emotional response.
- Typical duration: 5–30 minutes
- Character: Fresh, bright, sharp, light
- Common materials: Citrus oils (bergamot, lemon, grapefruit), light herbs (basil, mint), aldehydes, green notes
- Molecular weight: Typically under 200 g/mol
- Boiling point: Generally below 250°C
Heart Notes (30 min–4 hours)
Heart notes (also called middle notes) emerge as the top notes fade. They form the core character of the fragrance — the personality that people associate with the scent. Heart notes are the reason you buy a perfume: they define whether a fragrance is floral, spicy, fruity, or oriental.
- Typical duration: 30 minutes to 4 hours
- Character: Full, rounded, complex, warm
- Common materials: Rose, jasmine, ylang ylang, geranium, spices (cinnamon, cardamom), fruity notes
- Molecular weight: Typically 150–300 g/mol
- The transition: Heart notes are detectable from the beginning but become dominant as top notes evaporate
Base Notes (2–24+ hours)
Base notes are the foundation — heavy, long-lasting molecules that anchor the entire composition. They provide depth, warmth, and tenacity. Without base notes, a fragrance would disappear within an hour. These materials have the largest molecular weights and lowest volatility, meaning they cling to skin and fabric for many hours.
- Typical duration: 2–24 hours (some last days on fabric)
- Character: Rich, deep, warm, heavy, tenacious
- Common materials: Sandalwood, cedar, patchouli, vanilla, amber, musk, oud, vetiver, benzoin
- Molecular weight: Typically over 200 g/mol
- Fixative effect: Base notes slow the evaporation of lighter molecules, extending the life of the entire fragrance
Beyond the Pyramid
The top-heart-base model is useful but imperfect. Modern perfumery increasingly uses “linear” structures where the scent remains consistent from first spray to dry down (common in clean/fresh fragrances). Some molecules like Iso E Super defy classification — they have no strong initial impact but create a persistent, evolving skin scent. The pyramid remains the best teaching tool, but don’t treat it as a rigid rule.