• When buying CBD-compatible vaporizer hardware in the EU, a Certificate of Analysis (COA) is your best evidence that a product meets safety and regulatory standards. But not all COAs are equal—ask who ran the test, what they tested, and whether the lab is accredited. This guide walks through the edge cases where COAs get confusing, so you can shop with confidence.
• A COA is only as good as the lab that issued it—check for ISO 17025 accreditation.
• Make sure the COA matches the specific product batch you're buying, not a generic sample.
• For hardware, ask about material safety and heavy metals, not just cannabinoid content.