# S-4 (Andarine)

> Aryl-propionamide SARM available in capsule or liquid form

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

- Web page: https://peptidemedixeu.com/en/products/s-4-andarine/
- Brand: Peptide Medix EU
- Category: [SARMs](https://peptidemedixeu.com/en/collections/sarms/)
- Purity: ≥98% by chromatographic assay; lot-matched COA available
- CAS number: 401900-40-1
- from €55 (EUR)

## Sizes and prices (EUR)

| Size | Price | SKU |
| --- | --- | --- |
| 10 mg · 60 capsules | €55 | S-4-ANDARINE-10-MG-60-CAPSULES |
| 30 mL liquid · 20 mg/mL | €68 | S-4-ANDARINE-30-ML-LIQUID-20-MG-ML |

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

## Specifications

- **CAS number:** 401900-40-1
- **Molecular formula:** C19H18F3N3O6
- **Molecular weight:** 441.36 g/mol
- **Form:** Oral capsules in a sealed bottle, or solution in a 30 mL dropper bottle
- **Purity:** ≥98% by chromatographic assay; lot-matched COA available
- **Solubility:** Poorly soluble in water; soluble in DMSO, ethanol and propylene glycol
- **Available options:** 10 mg × 60 capsules; 30 mL liquid at 20 mg/mL
- **Also known as:** Andarine, S-4, GTx-007, acetamidoxolutamide
- **Compound class:** Non-steroidal selective androgen receptor modulator (aryl-propionamide series)
- **Research areas:** Tissue-selective androgen signalling, muscle and bone models, androgen receptor pharmacology, anti-doping analytical methods
- **Storage:** Cool, dry and dark; refrigerate the liquid format and keep it upright

## Description

Andarine, or S-4, is a non-steroidal selective androgen receptor modulator from the aryl-propionamide class. It grew out of research on non-steroidal antiandrogens like bicalutamide: chemists altered that framework until the molecules still bound the androgen receptor but switched from blocking it to activating it in muscle and bone. It was one of the first members of the series to be described in depth in published papers.

As a small organic compound rather than a peptide, andarine ships without cold chain and needs no reconstitution. Two presentations are available — a sealed bottle of sixty 10 mg capsules, and a 30 mL dropper bottle at 20 mg/mL for labs that would rather pipette a set volume into media or vehicle. Identity and purity of every lot are assayed chromatographically against a ≥98% specification, and the lot certificate can be requested.

## Frequently asked questions

### What is andarine?

A non-steroidal SARM of the aryl-propionamide series, born from antiandrogen chemistry. It binds the androgen receptor, and animal studies describe partial agonism with different effects in muscle and bone than in prostate. It is a research compound, not a peptide.

### Capsule or solution — which should my lab use?

A capsule gives a set 10 mg unit, useful when whole units are practical and precision balances are scarce. The 20 mg/mL solution lets you pipette an exact volume without weighing a poorly soluble solid — usually the better route for in vitro dilution series.

### Is analytical documentation provided?

Yes. Each lot is assayed chromatographically with mass-spectrometric confirmation against a ≥98% specification, and the lot COA is available on request. Independent reviews of the SARM market keep finding mislabelled products — the reason documentation at lot level matters.

### What storage suits each format?

Capsules: sealed, dry, at room temperature or below, with the desiccant left in the bottle. Liquid: preferably refrigerated at 2–8 °C, upright and out of the light, with the cap closed tightly between uses to limit evaporation and oxidation.

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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/s-4-andarine/