Batch-specific vs generic
A useful COA is batch-specific: it carries a batch / lot number and reports the values for that lot. A generic, undated "typical values" sheet is a marketing document, not a release record. Always confirm the COA matches the batch you are receiving.
1. Identity and assay
- Product name, botanical source and part used match your order.
- Marker compound and assay result with the method stated (e.g. osthole 10% by HPLC). The result should meet or exceed the ordered specification.
- Extraction ratio or standardization grade as agreed.
2. Safety panel
- Heavy metals — lead, arsenic, cadmium, mercury, with limits and results.
- Microbiology — total plate count, yeast & mould, and pathogens (E. coli, Salmonella) reported as negative / not detected.
- Residual solvents and pesticide residue where the matrix and process require it.
3. Physical and batch metadata
- Appearance, particle size / mesh, loss on drying, ash.
- Batch number, manufacturing date, expiry / retest date and storage conditions.
- Test methods referenced (USP, AOAC, GB, pharmacopoeial).
Red flags
- No batch number, or "typical values" only.
- Assay reported without a method.
- Missing or blank safety panel.
- Dates or batch numbers that don't match the shipment.
How to request
Ask for a sample COA before ordering and a batch-specific COA with every shipment. To request a sample COA or specification sheet, contact our team.