Every lot tested before it ships.

Reference-grade peptides and compounds for in-vitro research. Each lot is analyzed by an independent laboratory with RP-HPLC and mass spectrometry, and its certificate of analysis is matched to the lot number on the vial.

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Lot purity 99.8%Illustrative trace

GR3-RT 30 mg research vial

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How every lot is released

Independent third-party analysis on each lot before it ships, with the certificate available on request.

Read the full methodology
  1. 01

    Sampling

    A vial from the lot is submitted to an independent laboratory (Janoshik Analytical).

  2. 02

    Identity by ESI-MS

    The observed mass is matched to the theoretical sequence mass.

  3. 03

    Purity by RP-HPLC

    A C18 gradient assay quantifies peak purity, typically ≥99% for single peptides.

  4. 04

    Certificate issued

    A signed certificate of analysis is issued with the analysis date.

  5. 05

    Matched to your vial

    The certificate is tied to the lot number printed on the vial label and sent on request.

Request the certificate for your lot

Enter the lot number printed on your vial. We'll email you its third-party certificate of analysis with identity, purity, testing lab, and analysis date.