Do you provide a Certificate of Analysis (COA) for every batch?
Yes — a full Certificate of Analysis (COA) is issued for every batch of michelia leaf oil, and it is attached to the batch record, the quotation and the shipment documents.
What the COA Reports
| Parameter | Reported value |
|---|---|
| Appearance | Clear, pale yellow to yellow-green mobile liquid |
| Odour | Fresh green-floral, tea-like white michelia leaf character |
| Relative density (20°C) | 0.860-0.900 |
| Refractive index (20°C) | 1.455-1.475 |
| Optical rotation (20°C) | −16° to −7° |
| Linalool (GC area%) | ≥ 70% (typical 80-88%) |
| Acid value (mg KOH/g) | ≤ 5 (GB); ≤ 1 (QB-grade internal target) |
| Methyl eugenol | 0.2-0.5% typical, actual GC-MS value stated |
| Solubility | 1:3 clear in 70% ethanol; soluble in fixed oils |
| Flash point (closed cup) | 67-75°C actual value |
Additional Batch Records
- GC-MS chromatogram with peak table (linalool, nerolidol, methyl eugenol and minor markers)
- Microbiological results when cosmetic-grade is requested (total count, yeast & mould, pathogens per GB 7916)
- Heavy metal results (Pb, As, Hg, Cd) for food-grade lots
- Batch number is printed on every drum, jerry can and bottle so the COA can always be traced back
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บทความนี้เผยแพร่เมื่อ 2026-09-07 และอัปเดตล่าสุดเมื่อ 2026-09-07 โดยจะมีการปรับปรุงเนื้อหาอย่างต่อเนื่อง
