topnoten

Topnoten, or top notes, are the most volatile components of a perfume, perceived immediately after application. They form the initial impression of a fragrance and are followed by heart notes (middle notes) and base notes, which develop as the scent evolves. In perfumery, the top layer of scent is responsible for the first sensory impact and for signaling how the fragrance will unfold over time.

Chemically, topnoten comprise highly volatile aroma compounds with low boiling points. They tend to evaporate within minutes to a couple of hours, shaping the opening character of the fragrance but rarely persisting as the scent settles. Their rapid evaporation allows the heart notes to emerge and define the fragrance’s main body.

Common examples of topnoten include citrus oils such as bergamot, lemon, and orange; as well as other bright materials like grapefruit, certain light fruits, and some green or herbaceous elements. The precise topnoten chosen by a perfumer helps establish the fragrance’s initial mood and can mask any harshness at first sniff.

Role in perfumery, design and perception: topnoten create the first sensory impact, influence consumer perception, and facilitate the transition to heart notes, which form the fragrance’s core. They are not intended to be the longest-lasting portion of the scent but are crucial for the opening experience and overall memorability.

In the fragrance pyramid, topnoten occupy the opening layer, distinct from the heart notes and base notes that develop later and endure longer. The concept reflects volatility and temporal evolution rather than fixed categories.