Tesamorelin

Description

What is tesamorelin?

Tesamorelin is a synthetic 44-amino-acid analogue of growth hormone releasing hormone with a molecular weight of about 5,136 Da. A prescription drug containing tesamorelin, Egrifta, has been FDA-approved since 2010. Peptryn’s vial is a laboratory research material and is not that product.

Tesamorelin specifications

Compound	Tesamorelin
Sizes	10mg, 20mg
Form	Lyophilized powder
Molecular weight	5,135.88 Da
Formula	C221H366N72O67S
CAS number	218949-48-5
Solubility	Water-soluble

Lot testing and COA

The latest published report is for lot 2026-08-05: 99.97% purity by HPLC-UV-MS and a negative endotoxin result, tested by MZ Biolabs. The certificate links to the laboratory’s own report, so you can check it without relying on us. The published report is for the 10mg lot. For other sizes, email [email protected] with your order number and we send the report on file.

Tesamorelin 10mg COA · COA Library

Ordering

Orders placed on peptryn.com ship from the USA with same-day dispatch, and shipping is free on orders over $150. For a question about a lot or a size, email [email protected].

Storage

Store lyophilized powder at -20°C, protected from light and repeated freeze-thaw cycles.

Frequently asked questions

What is tesamorelin?

Tesamorelin is a synthetic 44-amino-acid analogue of growth hormone releasing hormone, about 5,136 Da. Peptryn supplies it as a lyophilized laboratory material in 10mg and 20mg vials.

What purity is Peptryn’s tesamorelin?

Peptryn’s tesamorelin is verified at 99.97% purity by HPLC-UV-MS, tested by MZ Biolabs (lot 2026-08-05). Read the COA. HPLC purity is area percent, the share of the main peak among all detected peaks; see our guide to peptide purity for what that means.

How is tesamorelin stored?

Store lyophilized powder at -20°C, protected from light and repeated freeze-thaw cycles.

What is tesamorelin’s CAS number?

Tesamorelin’s CAS number is 218949-48-5. Molecular weight: 5,135.88 Da.

Is tesamorelin for human use?

No. Peptryn sells it for laboratory research only, and it is not approved for human or veterinary use. We do not give dosing or administration guidance.

Is Tesamorelin the same as Egrifta?

Tesamorelin is the active compound in Egrifta, an FDA-approved drug since 2010. Peptryn’s vial is a laboratory research material and is not that product.

Related: Tesamorelin peptide guide · What is a COA? · Peptide testing · Popular peptides

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For laboratory research use only. Not for human or veterinary use, and not a drug, food, dietary supplement or cosmetic. You must be 21 or older to buy.