We publish the number,
not the promise.
Every lot passes through the same three checks before it earns a spot in the catalog. Here's exactly what that means.
Mass spectrometry
Before anything else, we confirm the molecule is what it claims to be. Mass spectrometry measures the molecular weight of the compound and checks it against the theoretical value for the sequence.
If the measured mass doesn't match, the lot never moves forward. No substitutions, no "close enough."
High-performance liquid chromatography
HPLC separates the target peptide from any related impurities and reports the percentage as a single, sharp peak. We test the actual lot you'll receive, not a representative sample.
Our catalog standard is ≥98%, and most compounds run ≥99%. The chromatogram is included so you can see the peak yourself.
A lot-specific Certificate of Analysis
Identity and purity results are compiled into a Certificate of Analysis tied to the lot number printed on your vial. It ships with every order.
That means the paper in the box matches the powder in the vial — traceable, specific, and yours to keep on file.
MS-confirmed
Molecular weight verified against the theoretical sequence value.
≥98% HPLC
Measured per lot, with the chromatogram included in your documentation.
Lyophilized
Sealed, freeze-dried powder for stability in long-term frozen storage.