99%+ Purity Guarantee
If HPLC analysis of your received product shows purity below 99%, we will replace the order or issue a full refund. No questions asked.
How We Test Every Batch
Every peptide batch undergoes a comprehensive multi-method analytical testing protocol before receiving the label.
HPLC Analysis
High-Performance Liquid Chromatography
The gold standard for peptide purity assessment. Every batch is separated and quantified to confirm ≥99% target purity. Full chromatograms are included in the COA.
Mass Spectrometry
Molecular Weight Confirmation
Electrospray ionization mass spectrometry (ESI-MS) confirms the correct molecular identity of each peptide. This ensures you receive exactly the compound specified.
Endotoxin Testing
LAL Method
The Limulus Amebocyte Lysate (LAL) assay screens each batch for bacterial endotoxins, ensuring products meet stringent safety thresholds for research applications.
Sterility Testing
Microbiological Assay
Selected products undergo sterility testing using membrane filtration and direct inoculation methods to confirm the absence of viable microorganisms.
Certificate of Analysis
Every order ships with a comprehensive Certificate of Analysis (COA) that includes:
- HPLC chromatogram with purity percentage
- Mass spectrometry data confirming molecular identity
- Appearance and solubility characteristics
- Batch number and production date
- Storage recommendations and expiration date
- Endotoxin testing results (where applicable)
- Name and credentials of the certifying analyst
Batch Traceability
Every vial we ship carries a unique batch number that links back to the complete production and testing history of that specific production run.
Synthesis Records
Raw material sourcing, synthesis parameters, and yield data for the production run.
Purification Logs
HPLC purification conditions, column specifications, and fraction collection data.
Quality Control Testing
Full analytical testing results including HPLC purity, mass spec, and endotoxin assays.
Chain of Custody
Storage conditions, handling records, and shipping details from production facility to your door.
Verify Your Batch
Enter your batch number to view the full Certificate of Analysis and testing data for your specific product.
Enter the batch number printed on your vial label to look up purity, test date, and expiry information.
Ready to Order with Confidence?
Browse our full catalog of research peptides, each backed by our 99%+ purity guarantee and comprehensive analytical documentation.