Tirzepatide Technical Specification Sheet
Complete chemical, physical and handling data for tirzepatide as supplied including CAS number, molecular formula, sequence, purity, solubility and storage, covering all seven available vial sizes.
This sheet describes tirzepatide as manufactured and supplied. Batch-specific analytical results are reported separately on the Certificate of Analysis issued with each lot. Supplied for laboratory and research use only.
Before working with tirzepatide
The tirzepatide molecule is an approved medicine in some jurisdictions, but the compound supplied here is an unlicensed research material and is not that medicine. Compounds acting on these receptor pathways have documented gastrointestinal effects, reported signals for pancreatitis and gallbladder complications, and loss of lean mass alongside fat mass. Anyone evaluating this compound in a context involving human health should discuss it with a qualified healthcare professional first.
Tirzepatide, developed under the code LY3298176, is a 39-amino-acid synthetic peptide that activates two receptors: GIP and GLP-1. It was the first dual incretin agonist to reach the market, and it remains the most studied compound in that class.
This page is the technical reference — identity, purity, handling and storage. It is a specification, not a research summary. For background on the mechanism and the trial data, see the tirzepatide complete guide or the three-way comparison with semaglutide and retatrutide.
All seven vial sizes contain identical material at the same purity specification. Only the quantity differs, which is why one sheet covers the full range.
Product Identification
| Specification | Value |
|---|---|
| Product Name | Tirzepatide |
| Product Code | PCR-TIRZ-10 through PCR-TIRZ-120 |
| Compound Type | Synthetic dual receptor agonist — GIP and GLP-1 receptor pathways |
| Synonyms / Other Names | Tirzepatide; LY3298176; LY-3298176 |
| Amino Acid Count | 39 |
| Amino Acid Sequence | Y-{Aib}-EGTFTSDYSI-{Aib}-LDKIAQ-{Lys(C20 diacid via γGlu-AEEA linker)}-AFVQWLIAGGPSSGAPPPS-NH2 |
| Physical Form | Lyophilized powder, single vial |
| Research Category | Metabolic research peptide |
Chemical & Physical Properties
| Specification | Value |
|---|---|
| CAS Number | 2023788-19-2 |
| PubChem CID | 156588324 |
| Molecular Formula | C225H348N48O68 |
| Molecular Weight | 4,813.45 g/mol (average); 4,810.52 (monoisotopic) |
| Structural Notes | Modified GIP backbone with two aminoisobutyric acid residues (Aib2, Aib13); C20 eicosanedioic diacid conjugated at Lys20; C-terminal amide |
| Appearance | White to off-white lyophilized powder |
| Physical State | Lyophilized solid |
| Purity | ≥ 99% by HPLC-MS |
Tirzepatide, Mounjaro and Zepbound
Tirzepatide is the molecule. Mounjaro and Zepbound are Eli Lilly's brand names for finished pharmaceutical products built around it — Mounjaro approved in 2022, Zepbound in 2023. They are registered trademarks of Eli Lilly.
That distinction matters more here than it does for most compounds in this catalogue. Because an approved medicine exists, it is easy to assume that a research compound sharing the same molecule carries the same status. It does not.
What this product is not
This is not Mounjaro and it is not Zepbound. It is an unlicensed research compound supplied for laboratory use. It has no marketing authorisation from the FDA, the EMA, or Costa Rica's Ministerio de Salud, and it is not manufactured, packaged, or released under the quality system that governs those medicines.
Solubility & Reconstitution
| Specification | Value |
|---|---|
| Solubility | Soluble in bacteriostatic water |
| Recommended Diluent | Bacteriostatic water — supplied complimentary with every peptide order |
| Solution Appearance | May appear slightly turbid; expected for a lipid-conjugated peptide and not a sign of degradation |
| Solution Handling | Prepare fresh, keep cold, and avoid repeated freeze-thaw cycles |
Our vials hold 3 ml, which sets the practical ceiling on how much diluent can be added — the reconstitution calculator works this out for any vial size and target concentration.
Storage & Stability
| Specification | Value |
|---|---|
| Storage — Sealed Vial | Freeze at ≤ −20 °C, sealed, away from light and moisture |
| Shelf Life — Sealed | Approximately 24 months under recommended storage conditions |
| Storage — After Reconstitution | Refrigerate at 2–8 °C |
| In-Use Period | 28–30 days after reconstitution |
| Conditions to Avoid | Heat, direct light, moisture, and repeated freeze-thaw cycles |
Costa Rica's humidity makes storage a live concern rather than a formality. Let a frozen vial reach room temperature fully before breaking the seal, or condensation forms inside it. There is more in storing peptides in tropical climates.
Quality Assurance & Documentation
| Specification | Value |
|---|---|
| Analytical Method | High-performance liquid chromatography with mass spectrometry (HPLC-MS) |
| Batch Testing | Independent third-party analysis for identity, purity, and contaminants |
| Certificate of Analysis | Issued per batch — searchable in the COA database |
| Batch / Lot Number | Printed on the vial label and shown on the accompanying Certificate of Analysis |
The purity figure above is a release specification — the standard every lot must meet before it ships. The measured result for your specific vial is on that lot's Certificate of Analysis.
Intended Use & Regulatory Status
| Specification | Value |
|---|---|
| Intended Use | Research Use Only (RUO) — laboratory, analytical, and scientific applications |
| Uses Advised Against | Not for human or veterinary use. Not a drug, food, cosmetic, dietary supplement, or household product. Not for diagnostic or therapeutic use. |
| Regulatory Status | The tirzepatide molecule holds FDA approval as a finished pharmaceutical under Eli Lilly's brands Mounjaro and Zepbound. This product is neither of those medicines: it is an unlicensed research compound and is not approved for the prevention, diagnosis, treatment, or cure of any disease. |
| Distribution | Supplied within Costa Rica |
Vial Sizes & PDF Downloads
All seven sizes are the same material. Each PDF is a print-ready version of this sheet for the specific vial, suitable for filing with research records or attaching to a purchase order.
| Vial Size | Product Code | Product Page | Specification PDF |
|---|---|---|---|
| 10 mg | PCR-TIRZ-10 | Tirzepatide 10mg | Download PDF |
| 15 mg | PCR-TIRZ-15 | Tirzepatide 15mg | Download PDF |
| 20 mg | PCR-TIRZ-20 | Tirzepatide 20mg | Download PDF |
| 30 mg | PCR-TIRZ-30 | Tirzepatide 30mg | Download PDF |
| 40 mg | PCR-TIRZ-40 | Tirzepatide 40mg | Download PDF |
| 60 mg | PCR-TIRZ-60 | Tirzepatide 60mg | Download PDF |
| 120 mg | PCR-TIRZ-120 | Tirzepatide 120mg | Download PDF |
Current pricing and stock across all sizes are on the tirzepatide product page. Related compounds sit under peptides for weight loss.
Common Questions
Is tirzepatide the same as Mounjaro?
Tirzepatide is the active molecule in Mounjaro, but this product is not Mounjaro. Mounjaro and Zepbound are Eli Lilly's approved medicines, manufactured and released under pharmaceutical quality systems. What we supply is an unlicensed research compound containing the same molecule.
Is the 10 mg vial the same material as the 120 mg?
Yes. Every vial size contains the same peptide at the same ≥99% purity specification, with identical appearance, solubility and storage requirements. Only the quantity in the vial differs.
What is the correct molecular formula for tirzepatide?
C225H348N48O68, at an average molecular weight of 4,813.45 g/mol and a monoisotopic mass of 4,810.52. Some references quote 4,813.53 for the average weight; the difference comes from the isotopic abundance table used, not from a different molecule.
How does tirzepatide differ structurally from semaglutide?
Tirzepatide is built on a GIP backbone rather than a GLP-1 one, which is what gives it activity at both receptors. It carries two aminoisobutyric acid substitutions against semaglutide's one, and a C20 fatty diacid at Lys20 where semaglutide uses a C18 chain.
Why does the reconstituted solution look cloudy?
Tirzepatide carries a C20 fatty diacid chain, and lipid-conjugated peptides commonly produce a slightly turbid solution. It is expected and is not an indication that the material has degraded.
Is this a Certificate of Analysis?
No. This sheet states the specification every batch must meet. The Certificate of Analysis reports what one specific lot actually measured, with a lot number and test date. If you need to document the exact material you received, you need the COA.
How long does tirzepatide last once reconstituted?
Refrigerated at 2–8 °C, 28 to 30 days. Sealed and frozen at ≤ −20 °C, the lyophilized powder holds for approximately 24 months. Repeated freeze-thaw cycles degrade it considerably faster.
Is tirzepatide legal in Costa Rica?
The research compound supplied here is sold within Costa Rica for laboratory and research use only, and holds no marketing authorisation from Costa Rica's Ministerio de Salud. We do not ship internationally.
Questions about tirzepatide specifications?
If you need a batch certificate, documentation in a specific format for an institutional purchase, or clarification on anything in this sheet, get in touch. We answer every message personally.
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Important disclaimer: The information on this page is general educational and technical content only. It is not medical advice, a prescription, or a personalized recommendation. This specification sheet describes the product as supplied and does not constitute a Certificate of Analysis or a Safety Data Sheet. The tirzepatide molecule is approved as a finished pharmaceutical under Eli Lilly's brands Mounjaro and Zepbound, both registered trademarks of Eli Lilly; the compound supplied here is not those medicines, holds no marketing authorisation from the FDA, the EMA, or Costa Rica's Ministerio de Salud, and is intended for laboratory research only. Compounds acting on these receptor pathways carry documented gastrointestinal effects and reported signals for pancreatitis and gallbladder complications, and are associated with loss of lean mass alongside fat mass. Always consult a qualified healthcare professional before beginning any peptide protocol. Products sold by Peptides Costa Rica are intended for laboratory and research purposes only.
