Do you provide a Certificate of Analysis (COA) for every batch?
Yes. Every production batch of cinnamon bark oil is released with a full Certificate of Analysis (COA). The COA is issued by our in-house QC lab after physical-chemical and instrumental testing, and each container is traceable back to its batch number.
COA Content
| Parameter | Method | Typical reporting |
|---|---|---|
| Appearance / color | Visual | Clear pale yellow to dark yellow-brown liquid |
| Odor | Organoleptic | Intensely warm sweet-spicy cinnamic |
| Relative density (20°C) | Oscillating density meter | Within product window |
| Refractive index (20°C) | Refractometer | Within product window |
| Optical rotation | Polarimeter | -2° to +1° |
| Acid value | Titration (GB/T 14454.13) | ≤15.0 |
| Carbonyl content | Titration | ≥80% |
| trans-Cinnamaldehyde | GC-FID (GB/T 11538-2006) | ≥74% (GC) |
| Coumarin | HPLC (GB/T 27579-2011) | ≤0.1% (pharma grade) |
| Heavy metals | ICP-MS / AAS | Pb, As, Cd, Hg per limits |
| Microbiological | Plate methods | Total plate, yeast & mold, pathogens |
| Batch number & date | Traceability | Unique per batch |
- The COA also includes the GC-MS chromatogram summary so you can see the natural composition profile
- Documents can be issued in Chinese, English or bilingual, and specific third-party testing (SGS, Intertek, Eurofins) can be arranged on request
- Archive copies are kept for full traceability; just quote the batch number on the label
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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.
