What are the full physicochemical properties of this storax balsam oil?
Storax balsam oil is a dense, resinous liquid with values defined by the product specification and the ChP 2025 monograph.
Physicochemical Properties
| Parameter | Value | Test method / standard |
|---|---|---|
| Relative density (20°C) | 0.950–1.080 | GB/T 11540-2008 (ISO 279) |
| Refractive index (20°C) | 1.490–1.560 | GB/T 14454.4-2008 |
| Acid value | 50–76 (ChP) | ChP general method 0713 |
| Saponification value | 160–190 (ChP) | ChP general method 0713 |
| Total cinnamic acid | ≥ 23.0% (HPLC) | ChP general method 0512 |
| Appearance | Warm pourable balsamic semi-solid to viscous amber-brown liquid | Visual |
| Color | Dark amber to reddish brown (green fluorescence) | Visual / Gardner |
| Solubility | Soluble in ethanol & fixed oils; insoluble in water | — |
| Shelf life | 36 months (unopened, cool & dark) | — |
- The acid value and saponification value ranges follow the ChP 2025 Styrax monograph (酸值 50~76, 皂化值 160~190)
- Supercritical CO2 extract may show slightly higher density/refractive values; the Clevenger or heavy-oil separator is used because storax oil is denser than water
- Values reported on the batch COA are measured by digital density meter (KEM DA-840), automatic refractometer (KEM RA-600), and automatic potentiometric titrator per the methods above
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