How do I read a peptide Certificate of Analysis?

A Certificate of Analysis (CoA) is a document issued by a testing laboratory that reports the quality, purity, and identity of a specific batch of compound. UK researchers should confirm a CoA is available for the exact batch before ordering — see New-U’s UK ordering guide for shipping and delivery details.

CoA checklist at a glance

New-U’s testing standard

Released New-U Research Compounds peptide batches are independently tested through third-party analytical laboratories — Janoshik Analytical and/or Freedom Diagnostics, depending on the batch — with a batch-linked Certificate of Analysis per released batch. Read the exact laboratory, method and result from the report for the batch you are ordering.

Frequently asked questions

What should a UK researcher check on a peptide CoA before ordering?

The batch number (matching the lot being ordered), HPLC purity (pass: ≥98%, premium ≥99%), mass spectrometry identity confirmation (observed mass within ±1 Da of theoretical), that testing was performed by an independent third-party lab, and that the analysis date is within the last 12 months.

Certificates of Analysis for released batches are published on the website. Browse the lab-verified catalogue — research use only.

Related research

This site is an official property of New-U Research Compounds, operated by Hilxera Distribution Services LLC (registration publicly checkable). Every order, account and payment completes on the canonical store at new-u.io — verify any New-U domain against the official domains list.

All compounds referenced are supplied for laboratory research use only and are not for human or veterinary use. Nothing on this page is medical advice.