Third-Party Testing & Certificate of Analysis
Purity claims mean nothing without proof. Every batch of every compound we sell is independently tested before it ships, not by us, by a certified third-party analytical laboratory.
HPLC-UV Purity Analysis
High-Performance Liquid Chromatography with UV detection separates the peptide from synthesis byproducts, solvent residuals, and other impurities. The integrated peak area of the target compound is expressed as a percentage of total peak area. We require >98% purity before a batch is approved for sale.
Mass Spectrometry Identity Confirmation
Electrospray ionization mass spectrometry (ESI-MS) confirms the molecular weight of the compound matches the theoretical mass of the target peptide. This rules out substitution, truncated sequences, or mis-labelled vials.
Certificate of Analysis (COA)
A COA is issued for every lot number, documenting: product name, lot number, test date, analytical method, purity result, and identity result. COAs are batch-specific, not a single document reused across orders.
Lyophilization Under Controlled Conditions
After quality approval, compounds are lyophilized (freeze-dried) to remove residual solvent and maximize shelf stability. Lyophilized peptides stored at −20°C maintain bioactivity for years. Each vial is sealed under inert gas and foil-wrapped for light and moisture protection.
Sample COA Format
| Product | BPC-157 5mg |
|---|---|
| Lot Number | #RP-2025-0041 |
| Manufacture Date | 2025-10-15 |
| Expiry Date | 2027-10-15 |
| Analytical Method | HPLC-UV / ESI-MS |
| Purity (%) | 99.1% ✓ |
| Identity | Confirmed ✓ |
| Overall Result | PASS |
Testing FAQ
What does ≥98% HPLC purity mean?
HPLC purity measures the percentage of the target peptide relative to all detectable compounds in the sample. A result of ≥98% means at least 98% of the material is the correct peptide, with less than 2% coming from synthesis byproducts or impurities. We reject any batch that falls below this threshold.
What is a Certificate of Analysis (COA)?
A COA is a batch-specific document from the analytical lab confirming identity and purity. It includes: product name, lot number, test date, analytical method, purity percentage, and identity confirmation via mass spectrometry. Every lot we sell has its own COA, we do not reuse a single document across batches.
Is the testing lab accredited?
Yes, all testing is performed by an ISO/IEC 17025 accredited third-party laboratory. ISO/IEC 17025 is the international standard for testing laboratory competence, covering both technical competence and management system requirements. Testing is never performed in-house.
What is ESI-MS identity confirmation?
Electrospray ionization mass spectrometry (ESI-MS) confirms the molecular weight of the compound matches the theoretical mass of the target peptide. This rules out substitution, truncated sequences, or mislabelled vials, guaranteeing the compound is exactly what is stated on the label.