1. Components of International Organization for Standardization Tea Tree Standard.
| Molecule | Minimum concentration | Maximum concentration |
| Terpinen‐4‐ol R isomer ratio S isomer ratio | 35.00 67.00 29.00 | 48.00 71.00 33.00 |
| γ‐Terpinene | 14.00 | 28.00 |
| α‐Terpinene | 6.00 | 12.00 |
| 1,8‐Cineole | < 0.01 | 10.00 |
| p‐Cymene | 0.50 | 8.00 |
| Terpinolene | 1.50 | 5.00 |
| α‐Terpineol | 2.00 | 5.00 |
| α‐Pinene | 1.00 | 4.00 |
| Sabinene | < 0.01 | 3.50 |
| Aromadendrene | 0.20 | 3.00 |
| Ledene | 0.10 | 3.00 |
| δ‐Cadinene | 0.20 | 3.00 |
| Limonene | 0.50 | 1.50 |
| Globulol | < 0.01 | 1.00 |
| Viridiflorol | < 0.01 | 1.00 |
ISO‐4730: 2017; reproduced from Lam 2018.