Sold & shipped in the USAIndependently lab testedCOA with every orderPricing on requestFor research use onlySold & shipped in the USAIndependently lab testedCOA with every orderPricing on requestFor research use only

Independent testing

Tested by a lab we don't own.

Stack never self‑certifies. Each batch is analyzed by an independent laboratory in the United States before release, and the certificate of analysis travels with your order.

Test 1

Identity

Mass spectrometry

Confirms the molecular mass of the batch matches the target compound — the compound on the label is the compound in the vial.

Test 2

Purity

HPLC

High‑performance liquid chromatography separates the target peptide from related impurities and quantifies each fraction.

Test 3

Endotoxin

Bacterial endotoxin screening

Screens the batch for bacterial endotoxins, documented alongside identity and purity on the certificate.

Release ruleA batch that doesn't meet specification is not released. Every certificate describes the actual batch you receive — never a representative sample from an earlier run.
Illustration of a certificate of analysis with a chromatogram CERTIFICATE OF ANALYSIS INDEPENDENT LABORATORY · UNITED STATES COMPOUNDBPC-157 BATCH TEST DATE METHODHPLC · MS PASS TARGET PEAK RETENTION TIME → AUTHORIZED SIGNATURE

Documentation

What a Stack certificate includes.

Every certificate is issued by the testing laboratory, not by us, and is specific to the batch you receive.

  • Compound and batch number
  • Test date
  • Analytical method
  • Purity result
  • Mass confirmation
  • Issuing laboratory

Our approach

Batch‑specific, by design.

A certificate is only meaningful for the batch it describes. Rather than maintain a public archive that can drift out of date, we provide the certificate for the exact batch you receive with every order — and any current certificate on request, before you commit to anything.

Request a certificate of analysis

Tell us the compound — and the batch number if you have one — and we'll send the current certificate. Safety Data Sheets are also available on request.