Quality & Compliance
Understanding Certificates of Analysis (COAs): What B2B Buyers Should Check
A Certificate of Analysis is the single most important document in a cannabinoid purchase. Here is how to read one like a procurement professional.
What a COA is
A Certificate of Analysis is a third-party lab report confirming what is — and is not — in a given batch of product. It is your evidence of purity, potency, and safety.
Confirm the lab is independent and accredited
The report should come from an independent, accredited laboratory, not the seller’s in-house bench. Accreditation (such as ISO 17025) signals tested, audited methods.
Match the batch
A COA is only meaningful if it matches the lot you are actually buying. Check that the batch or lot number on the COA corresponds to your shipment, and that the date is recent.
Read every panel
- Potency — confirms label-claim cannabinoid content
- Pesticides — screened against action limits
- Heavy metals — lead, arsenic, cadmium, mercury
- Residual solvents — extraction byproducts
- Microbials — mold, yeast, pathogens
When in doubt, request it
Reputable suppliers share COAs without friction. If a COA is hard to obtain, treat that as a finding.
Source lab-verified cannabinoids in bulk
Get approved for wholesale pricing and current COAs. A specialist replies within one business day.
