What are the key physicochemical specifications — density, refractive index, and other quality values?
Relative density 0.880–0.940 (20°C), refractive index 1.455–1.485 (20°C). The national standard GB/T 44288-2025 (first national standard for wintersweet oil, issued 2025) defines the full technical requirements, test methods and inspection rules; recommended supplementary indicators per GB/T 14454/14455 series include moisture ≤0.5%, acid value ≤2.0 mg KOH/g and peroxide value ≤5 meq/kg.
Key Specifications
| Parameter | Value | Method reference |
|---|---|---|
| Relative density | 0.880–0.940 (20°C) | ISO 279 / GB/T 14454.4 |
| Refractive index | 1.455–1.485 (20°C) | ISO 280 |
| Moisture | ≤0.5% (recommended) | Karl Fischer (GB/T 14454.3) |
| Acid value | ≤2.0 mg KOH/g (recommended) | GB/T 14455.5 |
| Peroxide value | ≤5 meq/kg (recommended) | ISO 3960:2017 |
| Shelf life | 36 months | ISO 210:2023 |
- LY/T 3328-2025 sets raw-material quality: volatile oil ≥0.18%, quercetin ≥0.42%
- Each batch is released against the current GB/T 44288-2025 framework plus company QC limits
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This article was published on 2026-09-07, and last updated on 2026-09-07. The article will be continuously updated.
