Lab notes

Testing, quality and lab handling.

Plain-language guides to reading certificates of analysis, how compounds are tested, and how laboratories store and handle them. A new article every week.

• November 2, 2026 · 2 min read

  How to Read a Certificate of Analysis

  Purity, identity, lot number and dates: a line-by-line guide to what a COA tells you, and what to check before you rely on one.

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Every certificate of analysis we've published is in the COA Library.