Quality Standards & Third-Party Testing
Cellugenix Peptides sends the compounds it sells to an independent laboratory for testing and publishes the resulting Certificates of Analysis (COAs). All products are intended strictly for laboratory research use and are not approved for human or animal consumption, injection, or any clinical application. This page explains how research peptides are typically synthesized, what the third-party testing measures, and how to read the published reports.
Peptide Synthesis Process
Research peptides are produced using solid-phase peptide synthesis (SPPS), the standard method across the research peptide industry for building peptide chains. The process follows a sequence of controlled steps:
Resin attachment: The first amino acid is attached to a solid resin support, which anchors the growing peptide chain during synthesis.
Sequential coupling: Amino acids are added one at a time in the order of the target sequence.
Deprotection cycles: Protective chemical groups are removed between coupling steps so the next amino acid can attach at the right position.
Cleavage from resin: Once the full sequence is built, the completed peptide chain is cleaved from the resin.
Purification: The crude peptide is purified by preparative HPLC to separate the target peptide from incomplete sequences and synthesis byproducts.
Lyophilization: The purified peptide is freeze-dried into a stable powder for shipping and storage.
Testing Methods
Testing is handled by Testides, an independent third-party laboratory, so results are not generated in-house. Each published report covers the following:
| Test | Purpose | Method Used |
|---|---|---|
| Purity analysis | Measures the percentage of target peptide in the sample | HPLC-UV (High-Performance Liquid Chromatography), chromatogram at 214 nm |
| Content analysis | Measures the peptide mass in the vial against the stated amount | HPLC-UV quantification, reported as mass and fill accuracy |
| Appearance | Records the physical form of the sample | Visual inspection, with a photograph of the tested vial |
What Each Certificate of Analysis (COA) Contains
Each Testides report published in the Cellugenix COA library includes:
- Compound name, client and vendor
- Report number, with the dates the sample was received, tested and reported
- Expected content, measured mass and fill accuracy
- HPLC purity percentage, with the chromatogram
- Physical appearance and a photograph of the tested vial
- A QR code for digital verification with the laboratory
Current reports can be viewed in the COA library. Use the QR code on each report to confirm it with Testides directly.
Reading Purity Results
Purity is reported by HPLC for each tested lot. See the batch COA for the result that applies to a given compound.
An HPLC purity figure describes the share of the main peak in the chromatogram at the detection wavelength. It is a property of the tested sample, so compare results lot by lot rather than across compounds. For a walkthrough, see how to read a COA.
Records and Older Reports
Reports are kept on file so researchers can reference them later.
- Each report is archived under its Testides report number.
- Where a compound has no report in the library yet, the COA is available on request.
- Researchers can request an older report for a previous purchase by contacting Cellugenix support.
Important Reminder
All quality and purity data published by Cellugenix describes the characteristics of a research reagent and does not indicate suitability, safety, or approval for human or animal use of any kind.
Products remain intended strictly for laboratory research by qualified researchers, in accordance with applicable laws and institutional protocols.
