# MK-2866 (Ostarine)

> Enobosarm — non-steroidal SARM supplied as capsules or a liquid

All products are sold strictly for laboratory research use only. Not for human or veterinary use.

- Web page: https://peptidemedixeu.com/en/products/mk-2866-ostarine/
- Brand: Peptide Medix EU
- Category: [SARMs](https://peptidemedixeu.com/en/collections/sarms/)
- Purity: ≥98% by HPLC with identity confirmation; lot-matched COA available
- CAS number: 841205-47-8
- from €55 (EUR)

## Sizes and prices (EUR)

| Size | Price | SKU |
| --- | --- | --- |
| 10 mg · 60 capsules | €55 | MK-2866-OSTARINE-10-MG-60-CAPSULES |
| 30 mL liquid · 20 mg/mL | €68 | MK-2866-OSTARINE-30-ML-LIQUID-20-MG-ML |

_Catalog prices at build time; the web page and checkout are authoritative._

## Specifications

- **CAS number:** 841205-47-8
- **Molecular formula:** C19H14F3N3O3
- **Molecular weight:** 389.33 g/mol
- **Form:** Oral capsules in a sealed bottle, or solution in a 30 mL dropper bottle
- **Purity:** ≥98% by HPLC with identity confirmation; lot-matched COA available
- **Solubility:** Poorly water soluble; soluble in ethanol, DMSO and polyethylene glycol vehicles
- **Available options:** 10 mg × 60 capsules; 30 mL liquid at 20 mg/mL
- **Also known as:** Ostarine, enobosarm, GTx-024, S-22
- **Compound class:** Non-steroidal selective androgen receptor modulator (aryl-propionamide)
- **Molecular target:** Androgen receptor (NR3C4), partial agonist activity in the reported literature
- **Metabolic note:** Not a substrate for aromatase or 5-alpha-reductase
- **Research areas:** Androgen receptor pharmacology, tissue-selective anabolic signalling, muscle-wasting and bone-density models, doping-control analysis
- **Storage:** Cool, dry conditions away from direct light; refrigeration extends shelf stability

## Description

The whole SARM class was designed around one question in pharmacology: can a compound activate the androgen receptor in a tissue-selective way — clearly building muscle and bone, yet acting differently from testosterone or synthetic anabolic steroids in the prostate and other reproductive organs? Researchers usually attribute that selectivity to the particular shape the receptor takes with each ligand, to differences in which coregulators it recruits, and to the fact that — ostarine not being a steroid — neither 5-alpha-reductase nor aromatase can convert it.

No compound in the class has a longer development history than ostarine (MK-2866), which also appears under the names enobosarm, GTX-024 and S-22. Chemically it is an aryl-propionamide, a family that grew out of the first non-steroidal antiandrogens rather than from any modified steroid. Weighing 389.33 g/mol, with the formula C19H14F3N3O3, it contains no steroid rings, and since neither aromatase nor 5-alpha-reductase acts on it, the complications caused by metabolites in testosterone research don't arise. We stock two forms from material HPLC-tested to at least 98%: a bottle of 60 capsules of 10 mg when a fixed amount per unit is wanted, or 30 mL of 20 mg/mL solution for dilution series. A large, separate body of literature deals with detecting ostarine and its metabolites in doping tests.

## Frequently asked questions

### Is ostarine a peptide?

No. It is a small non-steroidal organic molecule from the aryl-propionamide class (C19H14F3N3O3, 389.33 g/mol). It is listed next to research peptides because the same labs study both, not because the structures are alike.

### In which formats is it sold?

Two: capsules — 60 per bottle, 10 mg each — or a 30 mL bottle of solution at 20 mg/mL for measuring by volume. Capsules give you a set amount per unit, while the liquid is the better choice for serial dilutions and for in-vitro or animal studies that need a matching vehicle control.

### Does an outside lab verify it?

Yes. An independent laboratory analyses every lot by HPLC with identity confirmation, and the Certificate of Analysis for your batch is available. Check the container's lot number against the COA before you log any data.

### How do I store the two formats?

Both should be kept sealed, cool, dry and out of direct light. Refrigeration lengthens shelf stability and is usual for the solution; let a cold container warm to room temperature before opening so condensation cannot affect the contents.

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All products offered on this website are intended solely for in-vitro laboratory research and development by qualified professionals. They are not drugs, foods, cosmetics or dietary supplements, and are not intended to diagnose, treat, cure or prevent any disease. Products must not be introduced into humans or animals in any manner. By purchasing, you confirm that you are a qualified researcher and accept full responsibility for handling and storage in accordance with applicable laws.

Peptide Medix EU · https://peptidemedixeu.com/en/products/mk-2866-ostarine/