Quality Assurance & Certificates of Analysis

Our Commitment to Quality

At CertPeptides, quality is the foundation of everything we do. Every batch of research peptides undergoes rigorous third-party laboratory testing before it reaches your lab. We publish full certificates of analysis (COA) for complete transparency — because researchers deserve to know exactly what they're working with.

Testing Methodology

Each peptide is analyzed using industry-standard analytical methods:

• High-Performance Liquid Chromatography (HPLC): Confirms peptide purity to ≥98–99% for every batch.
• Mass Spectrometry (MS): Verifies molecular weight and structural identity of each compound.
• Endotoxin Testing (LAL): Ensures products meet acceptable endotoxin levels for research applications.
• Sterility Testing: Bacteriostatic water and reconstitution supplies undergo sterility verification.

Third-Party Independence

All testing is performed by accredited, independent analytical laboratories — never in-house. This ensures unbiased, verifiable results that you can trust for your research. Our testing partners hold ISO 17025 accreditation and follow GLP (Good Laboratory Practice) standards.

What Each COA Includes

• Product name and batch/lot number
• Purity percentage (HPLC)
• Molecular weight confirmation (MS)
• Appearance and physical description
• Date of analysis and expiration
• Laboratory name and analyst signature