Glossary
A chemotype is a chemically distinct type of essential oil that can come from the same plant species but have a different dominant chemistry, aroma, and safety profile.
What Chemotype Means
Some aromatic plants can produce oils with different chemical profiles depending on genetics, growing conditions, region, harvest timing, and other factors. These chemically distinct profiles are called chemotypes. The botanical name may be the same, but the oil can behave differently.
Why It Matters
Chemotype can affect aroma, blending, topical safety, respiratory cautions, and appropriate use. This is especially important for oils such as thyme, rosemary, basil, and some other herbs where different chemotypes can feel and function very differently.
Example in Essential Oil Use
Thyme essential oil can be linalool-rich, thymol-rich, carvacrol-rich, or have another chemotype. A softer linalool-rich thyme oil is not the same practical choice as a strong phenolic thyme oil.