What Purity Percentage Should a Research Peptide Have?
Published October 19, 2026
Many research peptide suppliers aim for 98% purity or higher, measured by HPLC. That number tells you how much of the sample is the target peptide versus impurities like shorter fragments or leftover material from synthesis. Purity is only half the picture, though. You also need proof the molecule is the right one.
How Purity Is Measured
HPLC, or high performance liquid chromatography, separates the parts of a sample and measures each one. The purity percentage is the share of the total that is the target peptide. A higher number means fewer impurities.
Why Purity Alone Is Not Enough
A sample can be highly pure and still be the wrong molecule. Mass spectrometry measures molecular weight and confirms identity. A trustworthy COA reports both results. Our guide to reading a COA shows where to find each one.
Check the Lot, Not Just the Product
Purity can vary from batch to batch. Look for the purity result tied to the lot number on your vial. The purity for every DryV lot is printed on its Certificate of Analysis, posted on our Lab Results page.
Frequently Asked Questions
What is a good purity for research peptides?
Many suppliers target 98% or higher, measured by HPLC.
Does high purity mean the peptide is correct?
Not by itself. Mass spectrometry is needed to confirm the molecule's identity.
Where can I see the purity of a DryV product?
On the Certificate of Analysis for that lot, posted on our Lab Results page and linked from each product page.
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All products sold by DryV Life are supplied for laboratory research use only. They are not for human or animal consumption and are not intended to diagnose, treat, cure, or prevent any disease or condition. These products have not been evaluated by the FDA.