If a supplied lot fails agreed specifications, we’ll replace it at no cost or refund its purchase price in full.
Quality test failed? Free replacement or full refund.
Off-spec? Free replacement or full refund.
PCAC will review 7 peptides for the 503A bulks list, BPC-157, KPV, TB-500, MOTS-c, Emideltide, Semax, Epithalon. Read our briefing →
PCAC will review 7 peptides for the 503A bulks list. Read →
FDA PCAC reviews 7 peptides in July. Read →
GIP / GLP-1 dual receptor agonist
Supply and ordering
Compare Tirzepatide fill sizes, minimum orders, and recurring supply options alongside other GLP-1 products in your catalog.
Overview
Tirzepatide is a 39-amino-acid synthetic peptide engineered as a balanced dual agonist of the GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 receptors. The molecule incorporates a C20 fatty-diacid moiety on a Lys side chain that drives albumin binding and gives the once-weekly pharmacokinetic profile that distinguishes it from earlier GLP-1 mono-agonists. As an active ingredient, Tirzepatide is the basis of the FDA-approved finished drug under the brand names Mounjaro (type 2 diabetes) and Zepbound (chronic weight management). PeptideXpo supplies lyophilized Tirzepatide acetate to a ≥99.0% HPLC purity specification, with a batch-specific COA available from sales that covers peak-integration HPLC and ESI mass-spec identity within 0.5 Da of theoretical; water content by Karl Fischer and counter-ion quantitation are available on request and listed on the COA when tested. Sequence verification by LC-MS/MS can be included when required by the buyer’s written analytical scope. The catalog vial range, 5 mg through 120 mg, 11 standard fills, is the broadest in our catalog and accommodates everything from pilot research aliquots to 503A / 503B compounding pharmacy workflows. Custom fills and sterile-filled vials are available through the OEM service.
Who buys this, and why
Most buyers in this category are 503A and 503B compounding pharmacies fulfilling metabolic and weight-management protocols, plus research labs investigating GLP-1 / GIP / GCG receptor pharmacology. The procurement decision usually hinges on three things: documented purity at scale, a regulatory team that can respond on destination-market questions in writing, and the ability to supply consistent counter-ion form (acetate by default) across recurring orders.
Primary buyer fit: 503A / 503B compounding pharmacies and academic and contract research laboratories.
Specifications
Also available as a nasal spray (US stock)
Besides lyophilized vials, Tirzepatide is stocked in the US as a ready-to-use nasal spray.
Documentation available on request
Each picture is a low-resolution preview of a report's first page, with batch and report numbers covered. For the full, clear report, ask our sales team, naming the product and strength.
Batch COATirzepatide 2 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 5 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 10 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 15 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 20 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 30 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 40 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 50 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 60 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 80 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 100 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Batch COATirzepatide 120 mg
HPLC purity · MS identity
Batch COA
Full, clear copy from sales
Independent test fails? Full refund. How it works
Regulatory note
Sold as a bulk active for research and for compounding-pharmacy formulation where local regulations permit. The Tirzepatide finished drug is FDA-approved (Mounjaro / Zepbound); the bulk active itself is not currently on the 503A bulks list, and compounding eligibility depends on the destination market's current shortage / regulatory posture, which buyers are responsible for verifying at the time of dispense.
Selected literature
Frequently asked questions
Tirzepatide CAS is 2023788-19-2. Molecular formula C225H348N48O68, average MW 4813.45 g/mol. The molecule is a 39-amino-acid synthetic peptide with a C20 fatty-diacid albumin-binding moiety; every batch COA confirms its identity by mass spec against this MW.
Both are once-weekly fatty-acid-conjugated peptide GLP-1-pathway agonists, but the receptor profiles differ: Semaglutide is a selective GLP-1 mono-agonist, while Tirzepatide is a balanced GIP / GLP-1 dual agonist. Sequence-wise Tirzepatide is 39 amino acids vs. Semaglutide's 31, and the fatty-acid linker geometry is different (C20 diacid on Tirzepatide vs. C18 diacid on Semaglutide). In clinical readouts the dual mechanism produces larger HbA1c and weight reductions than the GLP-1 mono-agonist class at comparable exposures.
Tirzepatide ships as the acetate salt by default. Acetate is preferred over TFA for downstream pharmaceutical and compounding use because residual TFA can suppress observed potency in cell-based and binding assays and complicates removal in finished formulations. TFA-salt material can be supplied on explicit request, but most compounding pharmacy and research buyers should default to acetate.
Standard fills range from 5 mg to 120 mg per vial, 11 sizes in total (5, 10, 15, 20, 30, 40, 50, 60, 80, 100, 120 mg). Compounding pharmacies most commonly order 5 mg, 10 mg, 15 mg, and 20 mg fills for finished-dose preparation; research labs typically buy the 5 mg fill. Custom fill volumes, sterile-filled vials under ISO 7/8 cleanroom conditions, and pre-blended Tirzepatide-plus-cagrilintide combinations are available through the OEM service.
Yes. Tirzepatide is also stocked as a ready-to-use nasal spray (5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg) in 10 mL or 20 mL bottles, from 10 bottles of each. These orders ship from our US stock; ask our sales team for details and a quote.
Send any vial from your order to an independent laboratory of your choice. If the report shows the product does not meet the specification on its COA — purity below the stated minimum, or an identity that does not match — share the report with our sales team and we refund that product in full.
Related peptides
GLP-1 receptor agonist
Nasal spray available
GIP / GLP-1 / glucagon tri-agonist
Nasal spray availableCapsules available
Long-acting amylin analog
Nasal spray available
