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Tirzepatide

Tirzepatide at a glance

Peptide.Express Tirzepatide (CAS 2023788-19-2) starts at $100, ≥99% pure by HPLC, with a molecular weight of 4813.5 Da and molecular formula C225H348N48O68, third-party tested with a Certificate of Analysis you can verify before purchase. Ships same day on US orders placed before 2 PM EST, free over $150. For in-vitro laboratory research use only.

Tirzepatide — research-grade lyophilized peptide vial from Peptide.Express, ≥99% HPLC purity
≥99% PurityUS SynthesizedOut of Stock

For laboratory research use only. Not for human or veterinary use.

Tirzepatide (INN; development code LY3298176; catalog name GLP2-TIRZ / GLP-TIRZ) is a synthetic 39-amino-acid dual agonist of GIPR and GLP-1R. Molecular formula C225H348N48O68, molecular weight 4,813.5 Da, CAS 2023788-19-2. A C20 fatty diacid at Lys20 supports albumin binding in published pharmacology. This research-grade material is not an approved tirzepatide drug product, is not manufactured under pharmaceutical GMP, and is not a substitute for any finished labeled medicine from other manufacturers. Approvals attach to those products — not to this SKU.

≥99% HPLC on this screen is the sourcing specification every accepted lot must meet, not a measurement of any one vial. The measured HPLC figure and LC-MS/MS mass for a lot appear only on that lot’s Certificate of Analysis (how to read a peptide COA). For in-vitro laboratory research use only. Not for human or veterinary use.

Purity standard: Tirzepatide is sourced to ≥99% HPLC — sourcing spec. See how to read a peptide COA.

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60mg · $100.00/vial

$100.00$150.00ListUSD / Unit
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Certificate of Analysis

Showing CoA for 60mg.

Batch TZ81726

Identity on CoA
Tirzepatide 60mg
HPLC (measured)
99.67%
Sourcing spec (separate line)
≥99% by HPLC
Lot
TZ81726
Accession / CoA number
74798
Reported
2026-08-23
Received
2026-08-20
Labeled
60 mg
Net content
61.50 mg
Endotoxin
NMT 0.05 EU/mL (PASS)
Method
HPLC-UV + LC-MS
Lab
Mistral Diagnostics
Matrix
Lyophilized
View CoAVerify with testing laboratory
HPLC VerifiedIdentity & purity
CoA Every OrderThird-party CoA
Free US ShipOrders over $150
Showing CoA for 60mg
Certificate DetailsBatch: TZ81726
Batch IDTZ81726
Test DateAugust 23, 2026
Accession / document id74798
Purity (measured)99.67%
Sourcing spec≥99% by HPLC
LotTZ81726
Accession / CoA number74798
Reported2026-08-23
Received2026-08-20
Labeled60 mg
Net content61.50 mg
EndotoxinNMT 0.05 EU/mL (PASS)
LabMistral Diagnostics
Methodology
HPLCLC-MS/MS
CAS Number2023788-19-2
Molecular FormulaC225H348N48O68
Molecular Weight4813.5 g/mol
Sequence39-amino-acid dual GIP/GLP-1 agonist with C20 fatty diacid at Lys20
Verify Results with Testing Laboratory

Issued by an independent third-party laboratory; Peptide.Express does not test in-house. Results are reproduced as-is and confirm compound identity, purity, and the analytical methods used. For questions about specific results, contact support@peptide.express.

Safety Data Sheet (SDS)
≥99% by HPLCLC-MS/MS VerifiedCoA Every BatchIn-Vitro Research Use Only

Tirzepatide Specifications

Identity, purity and storage specifications for Tirzepatide.
CompoundTirzepatide
CAS2023788-19-2
Molecular formulaC225H348N48O68
Molecular weight4,813.5 Da
Sequence39-amino-acid dual GIP/GLP-1 agonist with C20 fatty diacid at Lys20
Purity≥99% by HPLC
FormLyophilized powder
Storage (lyophilized)-20°C, desiccated, protected from light
Storage (reconstituted)2–8°C, use within 14–28 days

Reconstituting Tirzepatide: step-by-step peptide reconstitution guide. Concentration maths: peptide reconstitution calculator.

Buying Tirzepatide — Frequently Asked Questions

What purity standard does Peptide.Express use for tirzepatide?

Sourcing spec is ≥99% by reverse-phase HPLC (area-under-curve), with LC-MS/MS mass confirmation against 4,813.5 Da. This 60mg document (CoA 74798, lot TZ81726) measured 99.67% HPLC. For in-vitro laboratory research use only. Not a medicine. Not FDA-approved.

Where is the Certificate of Analysis for tirzepatide?

On this page and in the Peptide.Express lab results library. The 60mg presentation is covered by Mistral Diagnostics CoA 74798, lot TZ81726, reported 2026-08-23. HPLC purity on this document is 99.67%. Endotoxin (USP <85>) is NMT 0.05 EU/mL (PASS). Accession 74798 is the document id. Verify at mistraldiagnostics.com/verify?id=74798. The 30mg presentation is out of stock and is not this CoA.

What testing does tirzepatide undergo before shipping?

Reverse-phase HPLC for purity, LC-MS/MS for molecular weight identity, LAL endotoxin testing, and visual QC for appearance and particulate matter. All of it is performed by an independent third-party laboratory, per production batch.

How should tirzepatide be stored before and after reconstitution?

Lyophilized: -20°C, desiccated, protected from light, stable for 24 months from manufacture. Reconstituted: 2–8°C, used within 14–28 days. Do not freeze the reconstituted solution and avoid repeated freeze-thaw cycles — acylated peptides aggregate under thermal cycling.

When do research-peptide orders ship?

US orders placed before 2 PM Eastern ship the same business day. Orders over $150 ship free inside the US. See the shipping page for the current policy. For laboratory research use only. Not for human or veterinary use.

Is tirzepatide FDA approved?

Finished tirzepatide drug products are approved under other manufacturers' labels. This research-grade material is not that product and is not approved.

Tirzepatide research reference

Research Compounds Related to Tirzepatide

RetatrutideThe investigational triple GLP-1R/GIPR/GCGR agonist studied against tirzepatide to isolate what the glucagon receptor arm contributes.TesamorelinGHRH analog with an FDA approval precedent, studied on the visceral adipose side of metabolic research.MOTS-cMitochondrial-derived peptide acting through AMPK rather than through incretin receptors.Bacteriostatic WaterThe standard diluent for reconstituting lyophilized acylated peptides such as tirzepatide.

All products are sold for in-vitro laboratory research use only. Not intended for human consumption, clinical use, or veterinary use. Peptide.Express makes no medical claims. Consult the published literature for research application guidance.

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