Hemp Therapies Wiki / CBD Oil & Products

Certificates of Analysis and Third-Party Lab Testing

A Certificate of Analysis, or COA, is a lab report from an accredited third-party laboratory that verifies a CBD product’s cannabinoid content and tests it for contaminants.

What a COA Should Show

A COA typically confirms THC concentration, states whether contaminants were found, lists the product’s batch number, and includes other safety-related information. It should be checked for lab accreditation (such as ISO/IEC 17025), a batch number matching the product label, THC content within legal thresholds, “pass” or “not detected” results for contaminants, and a recent test date. Certificates typically report cannabinoid potency alongside the presence or absence of pesticides, solvents, heavy metals, and microbial contaminants such as bacteria, mold, and fungus. “ND” on a COA means no detection was found for the listed contaminant. A COA for one batch does not apply to a different batch — a QR code on product packaging commonly links to the specific batch’s results.

Why Third-Party Testing Matters

Because the FDA has not issued regulations specific to hemp-derived CBD products, independent testing is the primary mechanism available for verifying that a product contains what its label states and is free of contaminants. Testing can occur at multiple stages: on raw hemp biomass or crude oil for CBD and THC content and pesticides, on crude oil after THC removal, and on the finished distillate and finished batches for THC levels, pesticide residues, microbial contamination, heavy metals, and label-accuracy potency checks.

Summary

A Certificate of Analysis is the primary tool for verifying a CBD product’s actual contents against its label, in a market where the FDA has not issued its own testing regulations. A trustworthy COA is lab-accredited, batch-matched, dated, and covers both cannabinoid potency and contaminant screening.