International Therapy Examination Council (ITEC) Aromatherapy Practice Test 2026 - Free Aromatherapy Practice Questions and Study Guide

Top note essential oils are typically characterized by their light, fresh fragrances that are perceived immediately upon application but evaporate quickly. Citrus oils, such as orange and lemon, fall into this category because they have a bright and uplifting scent that is quickly identifiable.

These oils not only provide an initial burst of fragrance but also contribute to the overall aroma profile of a blend, enhancing its initial impact. Their volatility means they tend to evaporate faster than heavier oils, allowing other notes to surface within the blend in a balanced manner.

By contrast, thick and heavy oils usually represent base notes, and oils that last for days suggest longer-lasting and more profound scents typically associated with these deeper notes. Base notes usually provide foundation in aromatherapy and may take longer to evaporate. Thus, citrus oils as top notes play a crucial role in the aromatic balance and experience.