What does this zedoary turmeric oil look like — appearance, color and consistency?
This zedoary turmeric oil is a clear to pale yellow oily liquid in the fragrance-grade specification, and a pale brown to dark brown clear liquid in the pharmacopoeia grade, both with a characteristic pungent odour and slightly bitter, spicy taste. It is a moderately viscous oil with good fluidity that deepens slightly with age.
Appearance & Colour
| Item | Fragrance grade | Pharmacopoeia grade (ChP 2025) |
|---|---|---|
| Appearance | Clear to pale yellow oily liquid | Clear liquid, light to dark brown |
| Consistency | Mobile, moderately viscous | Mobile oily liquid |
| Odour | Intense camphoraceous-curcuma, warm spicy | Characteristic pungent odour, bitter-spicy taste |
| Reference density | 0.950-1.020 (20 C) | 0.970-0.990 (20 C) |
| Reference refractive index | 1.470-1.505 (20 C) | 1.500-1.510 (20 C) |
| Optical rotation | +5 to +20 (enterprise range) | +20 to +25 (50 mg/mL ethanol solution) |
Notes
- The colour naturally darkens with age and light exposure; the odour intensity and germacrone content are not affected within the 36-month shelf life
- At low temperature the oil may thicken or show slight clouding; gentle warming restores clarity
- Fragrance-grade batches are deliberately lighter in colour than pharmacopoeia grade, which is a normal product-positioning difference, not a quality difference
- Store sealed, protected from light, in a cool place per pharmacopoeia storage requirements
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บทความนี้เผยแพร่เมื่อ 2026-09-07 และอัปเดตล่าสุดเมื่อ 2026-09-07 โดยจะมีการปรับปรุงเนื้อหาอย่างต่อเนื่อง
