Purity you can verify
Certificate of Analysis Library
Every batch is tested by an independent lab. Find your product, match the lot number printed on your vial, and open the exact certificate for that batch — even if it shipped from an earlier lot. 29 certificates published.
Why every batch is tested
We send each production batch to an accredited third-party lab for HPLC purity and mass-spec identity confirmation before it ships — no in-house testing, no conflict of interest. The lot number on your vial matches the certificate here, so you can confirm exactly what you received. If independent testing doesn't confirm the stated purity, you get a full refund plus a free replacement.
Can't find your batch? The lot number is printed on the vial label. Contact us and we'll pull it for you.