Practical Guide

How to Read a Certificate of Analysis

Updated April 16, 2026

How to Read a Certificate of Analysis (COA)

A Certificate of Analysis documents the quality testing performed on a peptide batch. Understanding COAs is essential for verifying research-grade purity.

Essential COA Elements

Batch/Lot Number — unique identifier for this production run
HPLC Purity ≥98% — High Performance Liquid Chromatography confirms peptide purity
Mass Spectrometry — ESI-MS or MALDI-TOF confirms correct molecular weight
Endotoxin Test (LAL) — should be <5 EU/mg for research use
Third-Party Lab Attribution — independent laboratory name and credentials
Test Date — should be within 12 months of purchase

Use our interactive COA Checker tool to score any COA against research-grade standards.

Use the Interactive Version

This tool works best in the full Peptide Handbook with all interactive features enabled.

Open Full Handbook →

Research Use Only. All products sold by Lumen Peppers are intended solely for in vitro research and laboratory purposes. They are not drugs, supplements, or foods. Nothing on this page constitutes medical advice. Researchers are responsible for compliance with all applicable regulations. Last updated: April 16, 2026.