COAs for current inventory.

Certificate of Analysis Results: Purity, Lab, Lot, and Test Date for Every Report

Transcribed from the lab reports above. Last updated October 25, 2026.

Every value below is copied from the certificate of analysis for the lot Certified-PEP currently has in stock, so researchers can search, compare, and reference results without opening each report image. Peptide vials are tested by Vanguard Laboratory in Olympia, Washington, an ISO/IEC 17025:2017 accredited laboratory (A2LA Certificate #6377.01.01). Each vial lot has two Vanguard reports: a certificate of analysis measuring chromatographic purity, identity, and peptide content by HPLC-UV/VIS, and a contaminant screen measuring heavy metals by ICP-MS, bacterial endotoxins by LAL, and sterility by USP <71>. Capsule products are tested by Vanguard Laboratory or Freedom Diagnostics (LC-MS), and DSIP Atomized is tested by ILS Laboratories.

• 58 peptide vial lots carry a reported chromatographic purity: 42 test at 99% or higher and 52 at 98% or higher. The lowest current result is 93.20% (Oxytocin 10mg).
• 58 lots have a separate contaminant screen. In 52 of them, arsenic, cadmium, lead, and mercury were not detected and both endotoxin and sterility passed. The exceptions are listed row by row below.
• Lot numbers in this table are the lot numbers printed on each report. Every vial and bottle label also carries a QR code that links to the report for its lot, so a researcher can match a physical sample to its results.

How to Read These Results

Chromatographic purity

The share of the HPLC-UV/VIS signal that belongs to the target compound. A result of >99.80% means the main peak made up more than 99.80% of the measured signal.

±0.18%

The measurement uncertainty Vanguard Laboratory reports with each purity value.

Identity

Confirms the compound matches a reference standard (HPLC-UV/VIS) or its expected mass (LC-MS). "Not on report" means that report measured purity and content only.

ND (not detected)

The heavy metal was below the limit of quantitation (LOQ): 0.01 ppm for arsenic, cadmium, and lead, and 0.005 ppm for mercury.

Endotoxin (LAL)

Limulus amebocyte lysate test for bacterial endotoxins. "Pass (<5.00 EU/mg)" means the result was below that threshold.

Sterility (USP <71>)

The United States Pharmacopeia sterility test. "Pass" means no microbial growth was detected.

Report date

The release or report date printed on the certificate.

Research Peptide Vials: Purity and Contaminant Results

Capsules: Identity and Content Results

Raw Peptide Powders and Supplies

For research use only. All Certified-PEP products are sold strictly for laboratory research and are not for human or veterinary use. The data above describes the tested lots only and is provided so researchers can verify identity, purity, and contaminant results before use in a laboratory setting.