How soluble is this eucalyptus leaf oil — solubility profile?
Eucalyptus leaf oil is a hydrophobic, volatile oil. Solubility behaviour matters for formulation: it tells you whether the oil will stay clear in alcohol-based products, how to emulsify it into water-based systems, and why simple water dilution is not the right approach.
Solubility Profile
| Solvent / System | Behaviour |
|---|---|
| Water | Insoluble — separates and floats; shaking forms only a temporary dispersion |
| 70% ethanol | 1 vol + 5 vol 70% ethanol gives a clear solution (standard miscibility test) |
| 95-96% ethanol | Miscible in all proportions, clear |
| Fixed oils (almond, jojoba, etc.) | Soluble and miscible — the usual carrier for massage blends |
| Glycerin / propylene glycol | Partially soluble; glycols can be used with care in diluted systems |
| Surfactant systems | Emulsifies with a suitable emulsifier for sprays, gels, and washes |
- For aromatic sprays and perfumes, pre-dissolve the oil in ethanol before adding water
- For massage and muscle-relief oils, simply blend with a fixed vegetable oil — no surfactant needed
- In household cleaners, use a solubilizer (e.g., PEG castor oil derivatives) at 2-4x the oil weight
- A clear 70% ethanol solution (1:5) is part of the routine QC check on every batch
- Never add pure oil directly to water and expect a uniform product — it will not dissolve
Relate Products
This article was published on 2026-09-07, and last updated on 2026-09-07. The article will be continuously updated.
