Hey everyone I see a lot of new researchers posting certificates of analysis and asking if their compounds are good to go. It can definitely look confusing with all those squiggly lines and numbers at first glance. I wanted to break down how to actually read a liquid chromatography report so you can verify purity yourself before starting any bench work. The main thing you want to look at is the main peak retention time and the percentage area under the curve. Usually the biggest peak represents your target compound and the integrated percentage tells you the purity relative to any byproducts or residual synthesis materials. Anything above ninety nine percent is generally what you want to see for serious laboratory assay work. Always check if the testing lab is third party and independent rather than in house. Independent testing gives you way more confidence in what is actually sitting in your vial. Feel free to drop questions below if you are looking at a specific document and feeling lost.