Do you provide a Certificate of Analysis (COA) for each batch?
Yes — every batch ships with a COA stating physical constants, marker content (ligustilide, butylphthalide), water, acid and peroxide values, heavy metals and GC-MS fingerprint conformity, all tested by our laboratory.
COA Content
| Parameter | Tested value |
|---|---|
| Appearance / color | Visual check vs reference |
| Density / refractive index | ISO 279 / ISO 280 |
| Marker content | Ligustilide, butylphthalide (GC-FID/GC-MS) |
| Acid value / peroxide value | GB/T 14455.5-2008 / ISO 3960:2017 |
| Heavy metals | Pb, Cd, As, Hg per ChP 2302 |
| GC-MS fingerprint | Matched to reference standard |
| Pesticide residues | Per ChP 2303 (on request) |
- Batch number and production date are printed on the COA and match the container labels
- Third-party testing (SGS, Intertek) can be arranged at extra cost and lead time
- We keep reference samples for comparison for at least 24 months
Request the COA for the current batch together with a sample.
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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.
