Verified Quality

Verified US Quality: How to Read Your Peptide COA & HPLC Report

In an industry flooded with unreliable international suppliers, verifying the purity and identity of your research materials is essential. At BulkGLP, we are a US-based supplier committed to absolute transparency. This guide explains the third-party lab testing data that accompanies every product we sell.

The BulkGLP Advantage: A Trusted Domestic Source

  • Verified Purity: Every batch is third-party tested for purity, identity, and contaminants. What you see is what you get.
  • US Accountability: We operate entirely within the United States, providing accountable service and support.
  • Fast, Reliable Shipping: Our products are stocked domestically, ensuring faster and more reliable delivery to your lab.

Part 1: Decoding Your Certificate of Analysis (COA)

The COA is the summary of all quality control tests. It certifies that a specific batch (e.g., for Tirzepatide or Semaglutide) meets all required specifications. Here's how to read it.

Certificate of Analysis for Custom Peptide C from BulkGLP

Key Data Points Explained:

  • Molecular Ion Mass (MS): Confirms the peptide has the correct molecular weight (identity). Our result of 4731.42 is a perfect match.
  • Purity (HPLC): Shows the percentage of the target peptide. Our result of 99.45% far exceeds the industry standard of >98%, demonstrating exceptional purity.
  • Peptide Content (Mass Balance): The true active peptide content by weight is 94.9%. This value is critical for accurate research dosing.
  • Safety & Contaminants: Results of "N.D" (Not Detected) and "Conforms" for solvents and endotoxins prove the product is clean and safe for research.

Part 2: Interpreting the Raw HPLC Data

High-Performance Liquid Chromatography (HPLC) is the test that generates the purity value. It provides undeniable visual proof of quality. The dominant peak is your target peptide; everything else is a trace impurity.

HPLC Chromatogram Purity Test from BulkGLP showing 99.45% purity

Reading the Results Table:

  • Target Peptide (Peak #4): The data table quantifies the main peak's Relative Area at 99.45%. This is the purity value reported on the COA.
  • Trace Impurities: All other tiny peaks are measured. Their combined total is only 0.55%, confirming an exceptionally clean product.

Stop Guessing. Start Researching with Confidence.

Shop Our US-Stocked, Lab-Verified Peptides Have Questions? Contact Our US Team

!