Documentation You Can Verify
A Certificate of Analysis is your independent confirmation that what's labeled on the vial is what's inside it. XCELL Biotech publishes batch-specific COAs for every compound we sell — because transparency isn't a feature, it's a baseline requirement.
How Every Batch is Tested
Four independent verification methods applied to every production batch before release
HPLC Purity Analysis
High-Performance Liquid Chromatography separates and quantifies each compound component, confirming that the active peptide content meets or exceeds ≥99% of total composition.
Mass Spectrometry
Precise molecular weight measurement confirms that the compound synthesized matches the exact molecular structure of the labeled research reference — not just similar, exactly correct.
Identity Verification
Amino acid sequence analysis confirms the specific peptide structure against the labeled compound specification, ensuring what you receive matches the research reference exactly.
Batch Documentation
Each batch is assigned a unique lot number with a full quality control record tracking identity, concentration, appearance, and test dates — maintained on file and available upon request.
How to Access Your COA
Three steps to verify your batch documentation
Go to the Product Page
Navigate to the product page for your compound. Each page displays the current batch number and links to its corresponding COA document.
Open the COA Link
Below the product description you'll find a direct link to view or download the Certificate of Analysis PDF for the current production batch.
Review the Results
Check the purity percentage (≥99%), molecular weight confirmation, compound identity, and the test date to confirm your batch meets specification.
COA Questions
Need documentation for a specific batch?
Email us your order number and we'll send the batch-specific COA directly within 24 hours.
Email Support
Precision peptides.
Uncompromising purity.
≥99% purity verified by independent COA on every batch. Shipped same day.
Shop Now →Statements made regarding our products have not been evaluated by the U.S. Food and Drug Administration. The efficacy of these products has not been confirmed by FDA-approved research. Products are not intended to diagnose, treat, cure, or prevent any disease. These products are sold for research use only and are not intended for human or veterinary consumption.