Every lot, on the record.
Purity numbers are cheap to print and hard to trust. Each record below ties a lot number to a measured HPLC purity, a mass-spectrometric identity confirmation, and the independent laboratory that signed it off.
Batch registry
| Lot | Compound | Purity (HPLC) | Assay date | Laboratory | Method |
|---|---|---|---|---|---|
| BPC-202610A | BPC-157 | 99.46% | 2026-10-12 | Janoshik Analytical | RP-HPLC / ESI-MS |
| TB5-202609C | TB-500 | 99.18% | 2026-09-28 | MZ Biolabs Analytical | RP-HPLC / LC-MS |
| MOT-202609A | MOTS-c | 99.02% | 2026-09-15 | Janoshik Analytical | RP-HPLC / ESI-MS |
| SMX-202608E | Semax | 99.31% | 2026-08-30 | Janoshik Analytical | RP-HPLC / LC-MS |
The certificate itself — chromatogram, mass spectrum, and the laboratory's task number — accompanies every shipment, and can be requested for any lot before ordering.
How to verify a record
A certificate is only evidence if it can be checked by someone other than the party that issued it. Three steps, in order of increasing strength:
1. Match the lot number
The lot number on the vial label must match the lot number on the certificate, character for character. A certificate without a lot number is not a certificate — it is a specification sheet.
2. Read the chromatogram, not the summary
Purity is reported as main-peak area percentage at a stated wavelength. Check that the wavelength is declared, that the integration baseline is visible, and that the main peak is the one being quantified. A single number with no chromatogram behind it cannot be audited.
3. Cross-check the task number with the laboratory
Independent laboratories issue a task or verification number alongside each assay. That number can be checked directly with the issuing laboratory, which is the only step a supplier cannot fabricate unilaterally. If a supplier does not publish a task number, ask why.
Reading a certificate
Three figures carry most of the weight, and each is routinely misread:
- Purity (area %, HPLC). The share of total integrated peak area at the detection wavelength. It says nothing about the identity of the main peak — a pure sample of the wrong molecule scores 99%.
- Mass error (Da or ppm, ESI-MS). The difference between observed and theoretical mass. Close agreement confirms identity; it does not confirm purity.
- Terminal modifications. Acetylation, amidation and other end-group changes shift mass by a fixed amount. Where a modification is part of the specification, the spectrum must show it — a value 42 Da low is unacetylated material, not noise.
Purity and identity are separate claims and need separate evidence. A page that reports one without the other is describing half a molecule.