A certificate of analysis (COA) is a third-party lab document that tests a specific batch of hemp product and reports what it actually contains. In the unregulated hemp market — where a 2022 independent analysis found widespread label inaccuracy — a COA is the primary quality verification tool available to buyers. A COA from a credible lab (ISO 17025-accredited, not brand in-house) should include: cannabinoid potency panel (which cannabinoids, in what percentages), pesticide residue panel, heavy metals panel (lead, arsenic, cadmium, mercury), and residual solvents test. The COA should be batch-specific — matching the lot number on your product — not a generic company-level document. This guide explains how to read each section.

How do you read the cannabinoid potency panel?

The potency panel lists each cannabinoid detected and its concentration by weight (mg/g or %). For hemp products, you want to verify: the primary cannabinoid (CBD, delta-8, THCA, etc.) matches what's on the label; delta-9 THC is below 0.3% (0.3mg/100mg or 3mg/g); other cannabinoids present at meaningful levels are noted. If the label says "25mg CBD per gummy" and the potency panel shows 18mg/serving, the product is mislabeled — a common issue in the hemp market. COAs from well-run labs report detection limits alongside results, so you know whether "not detected" means truly absent or just below the test's sensitivity.

What should the pesticide panel show?

Pesticide results should all be "ND" (not detected) or below the action limit for each listed compound. Labs test against the same compounds as agricultural authorities. Any "PASS" result on a pesticide panel means all tested compounds came back below threshold or not detected. A "FAIL" on any pesticide is disqualifying — don't use a product with a failed pesticide screen regardless of how small the reading. Hemp is a bioaccumulator and will concentrate pesticides from soil, which is why this test matters particularly for botanical hemp products.

How do you verify a COA is legitimate?

Three verification steps: (1) The lab should be ISO 17025-accredited — check the lab's accreditation on the COA header or on the accreditation body's public database. (2) The batch number on the COA should match the batch number on your product. (3) The lab logo/name on the COA should match an actual existing laboratory — search the lab name to confirm it's a real entity. Fraudulent COAs do exist in the market; basic verification takes 2 minutes and substantially reduces risk. Find hemp products with accessible, batch-specific COAs at Elevated Haze.