Certificates of Analysis
Batch certificate lookup
Enter the batch number printed on your vial label.
Every lot we sell is released against an independent third-party certificate of analysis, and every certificate is published here. Find the batch number on your vial label and pull the exact chromatogram for the material in your hand.
What is on every certificate
| Compound & batch | Product name, sequence, batch number, synthesis and release dates |
|---|---|
| RP-HPLC purity | Full chromatogram, UV 214 nm, gradient conditions, peak area % |
| Mass spectrometry | Observed vs. theoretical mass, method, spectrum |
| Appearance | Physical description of the lyophilisate against specification |
| Testing laboratory | Name and accreditation of the independent lab — never the synthesis partner |
How to read an HPLC chromatogram
The chromatogram plots detector response against retention time. Your target compound is the dominant peak; its area as a percentage of total integrated peak area is the reported purity figure. What matters as much as the headline number is the shape of the baseline: a clean trace with one sharp, symmetrical peak indicates well-resolved material, while a cluster of small satellite peaks around the main peak usually means truncated or deletion sequences from incomplete synthesis.
Check the mass spectrometry section too. Purity tells you how much of the sample is one substance; mass spectrometry tells you whether that substance is the one on the label. A certificate reporting high purity without an identity confirmation is only answering half the question.
Batch numbering
Batch numbers follow the format VP-XX-YYMMDD, where XX is the compound code and YYMMDD is the release date. The number on the vial is the number on the certificate. If they do not match, contact us — we will replace the order and investigate the lot.
For research purposes only. Not for human consumption.