Testing & Quality
Independent HPLC and mass spectrometry testing to a ≥99% purity target, with a batch-specific Certificate of Analysis on every order.
Every reference compound is verified using two complementary analytical methods. High-performance liquid chromatography (HPLC) separates the sample and quantifies its purity, telling us precisely what fraction of the material is the target peptide versus process-related impurities. Mass spectrometry then confirms identity by measuring the molecular mass and matching it against the expected value for the sequence.
Together, HPLC answers “how pure is it?” and mass spectrometry answers “is it the right molecule?” Our target purity is ≥99%, and the measured value for your specific batch is recorded on its certificate.
A Certificate of Analysis (COA) is the testing record for a specific production batch. Each COA documents the batch / lot number, the measured purity percentage, the analytical methods used (HPLC and mass spectrometry), and the date of testing. It is the document that lets you tie the vial in your hand back to its underlying data.
A batch-specific COA ships with every order. You can browse current certificates on our Certificates of Analysis page.
Each production run is assigned a unique lot number that follows the material from synthesis through testing, packaging, and shipping. Because every COA is tied to that lot, any vial can be traced back to the exact batch it came from and the analytical data generated for it. This lot-level control is what makes purity claims auditable rather than aspirational.
Our reference compounds are synthesized and packaged domestically in the United States. We do not relabel material sourced from overseas resellers, which keeps the supply chain short and the testing chain accountable. You can read more about how we operate on our About page.
Lyophilized (freeze-dried) peptides are stored at −20°C, protected from light and moisture, to preserve integrity. After reconstitution, material should be aliquoted and stored cold to avoid repeated freeze-thaw cycles, which degrade peptides over time. Proper handling at the bench is as important to data quality as the purity printed on the COA.
A vendor grading its own product has an inherent conflict of interest. Independent, third-party HPLC and mass spectrometry analysis provides an objective and reproducible record that researchers can rely on. For research integrity, the value is in the data being external and verifiable — not in our word alone.
All ZynoPep products are sold strictly as reference compounds for in-vitro laboratory research. They are not intended or approved for human or veterinary use, diagnostic procedures, or any form of clinical application.
Our compounds are tested to a target purity of ≥99%, quantified by reverse-phase HPLC. The exact measured purity for the batch you receive is printed on its Certificate of Analysis.
We use two complementary methods: high-performance liquid chromatography (HPLC) to quantify purity, and mass spectrometry to confirm the compound's identity and molecular mass against its expected value.
Yes. A batch-specific Certificate of Analysis (COA) ships with every order. It documents the lot number, measured purity percentage, the analytical methods used, and the date of testing.
Independent testing removes the conflict of interest in a vendor grading its own product. External HPLC and mass spectrometry analysis gives researchers an objective, reproducible record of identity and purity for their work.