Research Peptide Purity in Canada: What 12 Independent COAs Show

Across the 12 research-peptide batches Popular Peptides Canada has published third-party Certificates of Analysis for, mean HPLC-UV purity was 99.12%, with a median of 99.45% and a range of 97.16%–100.00%. 8 of 12 batches tested at ≥99% purity, and all 12 tested at ≥98%. Every batch was analysed by an independent laboratory (TESTIDES) — not in-house — and each certificate is tied to a verifiable batch number.

This is a short, data-first report on the analytical quality of research peptides sold in Canada, using our own published lab results as the dataset. All figures are analytical measurements only; nothing here is guidance for use in humans or animals — these compounds are for in vitro laboratory research use only.

Why this matters

Purity is the number that separates a research-grade peptide from an unknown. A compound labelled “95% pure” contains up to twenty times more unidentified material than one at 99.75% — and in research, that unaccounted-for fraction is what confounds results. Yet most of the market either publishes no Certificate of Analysis at all, or publishes an in-house one with no independent lab named. The point of this report is simple: show the actual numbers, name the lab, and let the batch numbers be checked.

Methodology

Every batch is sent to an independent third-party laboratory (TESTIDES) and analysed on a standard panel:

• HPLC-UV purity & content analysis — chromatogram recorded at 214 nm — the primary purity measurement.
• LC-MS identity — confirms the compound matches the label.
• Content / fill accuracy — measured mass against labelled mass.
• Appearance — physical inspection of the lyophilized powder.
• Sterility — screen on the finished vial.

The data — 12 published batches

Summary (n = 12): mean 99.12% · median 99.45% · min 97.16% · max 100.00% · ≥99%: 8/12 · ≥98%: 11/12.