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Pepdor · Batch verification
Analysis commissioned by Pepdor · performed by an independent contract laboratory
coa@pepdor.com · pepdor.com/ledger

CERTIFICATE OF ANALYSIS - Tirzepatide batch TZ-2603-A

PEPDOR-COMMISSIONED

Document COA-TZ-2603-A

Issued Mar 09, 2026

PRODUCT

Tirzepatide

BATCH / LOT

TZ-2603-A

FORM

Lyophilized powder

SAMPLE ORIGIN

Sampled at fill - see batch record

RP-HPLC CHROMATOGRAM · 220 NM

RESULTS

TESTSPECIFICATIONRESULTSTATUS

AppearanceWhite lyophilized powderConformsPASS

Identity (ESI-MS)Matches theoretical massNot tested-

Purity (RP-HPLC, 220 nm)≥ 99.0%98.8%BELOW SPEC

Bacterial endotoxin (LAL)< 10 EU/mgNot tested-

SterilityReleased sterileNot tested-

Analysis performed by an independent contract laboratory, commissioned by Pepdor.

Pepdor is the commissioning party and publisher of record, not the testing laboratory.

Verify this document at
pepdor.com/batch/tz-2603-a

This certificate applies only to the batch and methods stated above (Pepdor-commissioned RP-HPLC; LC-MS, endotoxin, and sterility where indicated). Any parameter marked "Not tested" is not claimed. Independent third-party results are published as received in the public Test Ledger. Material is not produced under GMP and is not released as sterile or endotoxin-controlled unless explicitly stated for the batch. Research use only - not for human or veterinary use.

How to read this certificate

This document records the release testing for Tirzepatide batch TZ-2603-A, issued Mar 09, 2026. The headline figure is the reversed-phase HPLC purity of 98.8%, read by UV absorbance at 220 nm - the wavelength where the peptide bond absorbs - so it reflects how much of the sample is intact Tirzepatide rather than truncated sequences, deletion products, or process residuals.

Identity is a separate question from purity, so it is confirmed on its own by electrospray mass spectrometry (ESI-MS), which checks the measured mass against the theoretical mass of the peptide. Bacterial endotoxin is measured by the LAL assay and sterility by direct culture. Where a row above reads "Not tested", that parameter was outside the scope of this batch and Pepdor makes no claim about it - nothing here is inferred or carried over from an earlier lot.

Every result traces back to a physical sample pulled from the filled lot, not a hand-picked vial. You can cross-check this certificate against the full batch record for TZ-2603-A and any independent third-party reports for this batch, all published unedited in the public Test Ledger. If you have sent a vial of this batch to your own lab, you can add that report too - the ledger is append-only.