Cinnamon leaf oil and cinnamon bark oil come from the same tree but are not interchangeable. The leaves yield an oil that is predominantly eugenol (68-87%) — the same compound that dominates clove oil. The bark, by contrast, yields an oil that is predominantly cinnamaldehyde (45-65%) — the sharp, sweet, fiery compound most people associate with the word "cinnamon."
This chemistry difference produces a real aroma difference. Leaf oil reads as warm, spicy, and clove-adjacent with a sweet herbaceous depth — closer to a baking spice cabinet than to a Red Hots candy. Bark oil reads as fiery and immediately recognizable as cinnamon. The leaf is generally considered the gentler of the two and more versatile for everyday aromatherapy blending, though both require careful dilution because high-phenol oils can irritate skin and mucous membranes at higher concentrations.
The practical implication for this bottle: cinnamon leaf is primarily a diffusing and blending oil, not a skincare oil. Its very low topical limit (0.6%) reflects eugenol's irritation potential, not a defect of the oil — it is doing exactly what an eugenol-rich oil should do.
Eugenol (68-87%)
The dominant phenolic compound — the source of the warm, clove-like, spicy-sweet character. Also responsible for the 0.6% topical dilution limit; high eugenol concentrations can irritate skin and mucous membranes.
β-Caryophyllene (1-6%)
A woody, slightly peppery sesquiterpene found in clove, hops, and black pepper. Adds depth and length to the aromatic profile.
Linalool (1-5%)
A naturally occurring terpene alcohol that contributes a soft, slightly floral undertone — the same compound found in lavender.
Cinnamaldehyde (1-5%)
Present in small amounts in the leaf oil — the dominant compound in bark oil but a minor component here. Contributes a hint of recognizable cinnamon character on top of the eugenol base.
Benzyl Benzoate (trace)
A naturally occurring ester present in small amounts. Contributes to the oil's slight musky depth.