Which essential oil is an example of a base note?

Ylang ylang is classified as a base note in the context of essential oils. Base notes are typically rich and heavy scents that form the foundation of a fragrance blend. They tend to linger longer on the skin and in the air, providing depth and warmth to the aroma profile. Ylang ylang has a sweet, floral scent that can be quite intense, and its lasting properties make it a prime example of a base note.

On the other hand, rosemary, grapefruit, and tea tree are characterized differently in the context of aromatherapy. Rosemary is considered a middle note due to its herbal and refreshing qualities that help bridge the top and base notes. Grapefruit, known for its bright and uplifting citrus scent, falls under the category of top notes, which are typically the first impressions of a fragrance and evaporate quickly. Tea tree essential oil, with its sharp, medicinal scent, also serves as a middle note rather than a base note, providing both therapeutic properties and bridging aromatic qualities.