Tirzepatide API Raw Material Powder Price & Manufacturer

Tirzepatide, developed by Eli Lilly & Co, is a dual agonist of the GLP-1 (glucagon-like peptide-1) receptor and the GIP (glucose-dependent insulinotropic polypeptide) receptor; it is primarily used to treat type 2 diabetes and obesity. The production of Tirzepatide API (Active Pharmaceutical Ingredient) must meet rigorous standards for high purity and stability; Tirzepatide API is manufactured via chemical synthesis or biotechnology and adheres to Good Manufacturing Practice (GMP) regulations.

Tirzepatide was first approved in the United States and is now marketed in numerous countries worldwide.

(Tirzepatide peptide sequence)

Synthesis of Tirzepatide API

The process primarily employs a strategy combining solid-phase synthesis (SPPS) and liquid-phase synthesis (LPPS) to balance efficiency and purity.

What is solid-phase synthesis?

Solid-Phase Peptide Synthesis (SPPS) is a chemical synthesis method in which a peptide chain is constructed step-by-step on a solid support. First proposed by American chemist Bruce Merrifield in 1963, the method involves synthesizing the peptide chain by sequentially coupling amino acids onto a resin.

Eli Lilly (tirzepatide api manufacturer): Tirzepatide—the dual GIP/GLP-1 receptor agonist developed by Eli Lilly—is produced by synthesizing multiple short peptide fragments (AA1-14, AA15-21, AA22-29, and AA30-39) via solid-phase synthesis, as illustrated in Figure 1 below. These four fragments are subsequently joined using liquid-phase synthesis to yield the final product.

Notably, the solid-phase synthesis of these short peptide fragments does not involve coupling amino acids one by one; instead, Fmoc- or Boc-protected dipeptides or tetrapeptides are coupled to form longer fragments. This approach reduces amino acid consumption and impurity formation while enhancing production efficiency and product quality. Tirzepatide api price has decreased then.

(Tirzepatide COA of Omizzur Peptide,contact Omizzur services for full catalog )

Key Aspects of Tirzepatide API Production

1. Synthesis Process:

The API is prepared using solid-phase peptide synthesis (SPPS) technology, requiring strict control over reaction conditions (such as temperature and pH) and purification steps.

Impurity profiles must be monitored during production to ensure the final product meets pharmacopoeial standards.

2. Quality Control:

Key parameters include purity (≥98%), content of related substances, microbial limits, and stability (e.g., degradation under high temperature or light exposure).

Structural consistency must be verified using methods such as High-Performance Liquid Chromatography (HPLC) and mass spectrometry.

Tirzepatide API Synthesis Route

A fragment-based synthesis strategy utilizing fully protected peptide segments is employed; fully protected segments (e.g., residues 1–17 and 18–39) are first synthesized via solid-phase methods, followed by liquid-phase deprotection and coupling, which significantly shortens the synthesis cycle and improves yield.

Tirzepatide API Solid-Phase Synthesis Method

Rink amide resin is used as the solid-phase support for the stepwise coupling of amino acids. For example, Fmoc-Ser(tBu)-OH is anchored first, followed by sequential deprotection (using piperidine/DMF) and coupling (using HOBt/DIC for carboxyl activation) until the target sequence is completed.

Solid-phase synthesis example: Upon completion of synthesis, trifluoroacetic acid (TFA) is used to cleave the peptide from the resin and remove side-chain protecting groups, yielding the crude peptide.

Fragment Condensation and Native Chemical Ligation: For long peptide chains, pre-synthesized short peptide fragments can be coupled in the liquid phase—for instance, by linking fragments via thioester bonds (e.g., using Native Chemical Ligation or NCL technology).

(Omizzur Peptide Product Photos)

Optimization of Tirzepatide API Purification Process

Controlling impurities during Tirzepatide synthesis is challenging and requires the integration of advanced purification techniques:

1. Functionalized Silica Gel Separation Columns: Silica gel modified with 3-chloropropyltriethoxysilane and dicyandiamide/acetazolamide is used to enhance adsorption selectivity for the target peptide and improve separation efficiency.

2. Incorporation of Modified Diatomaceous Earth (treated with levulinic acid) to further remove hydrophobic impurities. Chromatographic Purification: Reversed-phase high-performance liquid chromatography (RP-HPLC; C18 and C8 columns) and the monodisperse polymeric reversed-phase packing material Seplife RP LXMS 15(300) are used for the fine purification of the final product, ensuring a purity of >98%.

Optimization Directions for Tirzepatide API Synthesis Processes

Fragment design and coupling efficiency: Optimize fragment lengths (e.g., 1–17 and 18–39) and coupling conditions in solid-phase synthesis to minimize side reactions. Biosynthesis technology: Utilize genetically engineered strains to express Tirzepatide, combined with post-synthetic chemical modification, to reduce costs. Separation technology upgrades: Implement techniques such as nanofiltration and ultrafiltration to streamline downstream processing and increase production capacity.

Challenges and Prospects for Tirzepatide API — Impurity Control:

Impurities (such as deletion peptides and oxidation products) are difficult to completely eliminate in hybrid solid-liquid synthesis methods, necessitating continuous purification process improvements. Market Competition: Due to a flexible chemical synthesis pathway and ample production capacity, Eli Lilly’s Tirzepatide is priced 20% lower than Semaglutide, exerting competitive pressure on other GLP-1 drug manufacturers.

Expansion of Indications: Tirzepatide has been approved for treating obstructive sleep apnea; future expansion into areas such as heart failure may drive further optimization of synthesis processes.

About Omizzur Peptide

Omizzur Peptide was established in 2019. It is a company focusing on peptide synthesis. Omizzur  is engaged in the custom synthesis business of various types of peptides: peptides API, cosmetic peptides, custom peptide synthesis services, antimicrobial peptides, catalog peptides, peptide libraries, etc.

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