Laboratory Verification & COAs
Commitment to Analytical Transparency
At Peptide Crafters, we believe that research integrity starts with absolute chemical transparency. In an industry where purity claims are often unverified, we set a higher standard. Every compound in our inventory undergoes a multi-stage analytical review to ensure it meets our 99% Purity Guarantee.
On this page, you can access the batch-specific data that confirms the molecular identity and purity of your research materials.
Our Testing Protocol
We utilize independent, third-party laboratories to perform rigorous testing. Our verification process consists of two primary analytical pillars:
High-Performance Liquid Chromatography (HPLC): Used to determine the exact purity percentage by separating the target peptide from any truncated sequences or synthesis byproducts.
Mass Spectrometry (LC-MS): Used to confirm the molecular weight and chemical identity of the peptide, ensuring the sequence exactly matches the intended research target.
Latest Batch Results
Below are the most recent analytical reports for our high-demand research compounds. If you require a COA for a batch not listed here, please contact our technical desk with your order number.
| Research Compound | Batch ID | Purity (HPLC) | Verification Date | Download Report |
| Retatrutide | PC-RET-094 | 99.4% | March 2026 | [View PDF] |
| Tirzepatide | PC-TIR-112 | 99.1% | April 2026 | [View PDF] |
| Semaglutide | PC-SEM-205 | 99.8% | April 2026 | [View PDF] |
| Tesamorelin | PC-TES-088 | 99.3% | February 2026 | [View PDF] |
| BPC-157 | PC-BPC-402 | 99.6% | March 2026 | [View PDF] |
How to Read Your COA
When reviewing a Certificate of Analysis from Peptide Crafters, focus on these three critical metrics:
Purity Percentage: This should ideally be >98%. A higher purity ensures that your laboratory results are not skewed by chemical “noise” or synthesis residues.
Mass Identity: The measured mass should align with the theoretical molecular weight of the peptide (e.g., the specific mass for a 5mg vial of BPC-157).
Chromatogram Profile: A single, sharp vertical peak on the HPLC chart indicates a clean compound, while multiple smaller peaks suggest the presence of impurities.
The Importance of Research-Grade Quality
Utilizing inferior reagents can lead to failed experiments and non-reproducible data. By choosing Peptide Crafters, you are ensuring that your study is built on a foundation of chemical excellence. We maintain a full digital archive of all previous batch results to assist institutions with long-term study audits.
Ready to start your next study? Browse our HPLC-Verified Shop →