What to Check in a Batch-Specific COA

How to read a Certificate of Analysis so the lot you receive matches the specification you ordered.

For B2B ingredient evaluation only. This article summarizes published research and market context for formulation and sourcing decisions; it is not a consumer health, disease prevention or treatment claim. Confirm the regulatory status of any ingredient and claim in your target market before use.

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.