Constituent · Oxygenated monoterpene
1,8-cineole
Also called eucalyptol — a fresh, camphoraceous oxide that defines eucalyptus and rosemary; the reason both smell "clearing".
Essential oils richest in 1,8-cineole
Measured relative composition (GC peak-area %) pooled across published GC-MS samples — median, typical range (middle 50%) and the maximum seen.
| Oil | Median | Typical range | Max | Samples |
|---|---|---|---|---|
| Petitgrain | 69.92% | 69.92%–69.92% | 69.92% | 1 |
| Cajeput | 57.96% | 55.23%–60.68% | 63.4% | 2 |
| Eucalyptus globulus | 50.29% | 11.12%–65.15% | 78.2% | 10 |
| Niaouli | 48.16% | 39.87%–56.46% | 64.75% | 2 |
| Patchouli | 44.68% | 44.68%–44.68% | 44.68% | 1 |
| Laurel | 41.01% | 34.17%–48.03% | 62.37% | 26 |
| Hyssop | 40.13% | 16.88%–52.58% | 67.1% | 6 |
| Spike lavender | 38.06% | 35.58%–39.86% | 42.31% | 12 |
| Cardamom | 23.84% | 22.84%–30.5% | 51.8% | 33 |
| Myrtle | 22.34% | 12.7%–35.6% | 55.09% | 51 |
| Rosemary | 19.47% | 10.96%–31.7% | 51.79% | 69 |
| Tarragon | 18.8% | 9.45%–50.35% | 81.89% | 3 |
| Ravintsara | 15.14% | 0.42%–39.1% | 65.33% | 11 |
| Tea tree | 14.38% | 4.11%–45.78% | 90% | 8 |
| Pine | 12.22% | 9.47%–14.96% | 17.71% | 2 |
| Lavandin | 12.1% | 10.26%–33.99% | 49.8% | 18 |
| Sage | 10.09% | 8.23%–13.59% | 45.7% | 86 |
| Yarrow | 9.64% | 5.77%–13.88% | 32.5% | 27 |
| Basil | 7.27% | 4.2%–9.25% | 24.12% | 134 |
| Wormwood | 7.12% | 0.76%–17.38% | 40.64% | 15 |
Oils in our library are linked above — open any profile for its full composition, safety panel and the research behind it.
Related constituents
Other oxygenated monoterpene compounds across the oils.
Figures are GC peak-area percentages pooled across published GC-MS samples, not concentrations, and describe chemistry — not health effects. How this is built →