Key highlights
Product specifications
| Compound Class | Selective Androgen Receptor Modulator (SARM) · Non-steroidal |
|---|---|
| Concentration | 20 mg/mL |
| Composition | USP-grade PEG-400 base, S23 (≥99% purity) |
| CAS Number | 1010396-29-8 |
| Chemical Formula | C18H13ClF4N2O3 |
| Molar Mass | 416.75 g/mol |
| Half-Life | ~11.9 hours |
| Synonyms | S23, S-23 |
| Volume | 30 mL per bottle (600 mg total) |
| Verified Purity | Batch-tested to 99.8% (HPLC) |
| Terms | For laboratory research use only. Not for human or animal consumption. |
Independently verified99.8% pure
Every batch is analyzed by an accredited US third-party laboratory before it ships.
Purity and identity confirmed by MZ Biolabs (Tucson, AZ), a US DEA-licensed analytical facility, via HPLC purity analysis and mass-spectrometry identity confirmation under GLP standards.
Our third-party certificates of analysis are published on our website — no login required.
Each bottle is formulated and verified for consistent label-to-bottle accuracy across studies.
Storage & handling
Built to preserve compound integrity throughout your research timeline.
- Storage: Keep in a cool, dry place away from direct sunlight to maximize shelf life.
- UV-resistant glass bottle with fixed glass dropper to minimize degradation and avoid plasticizer (BPA) leaching.
- Tamper-proof seal to ensure integrity in transit.
- Graduated 1 mL glass pipette included for precise measurement.
- Evaporation-resistant formulation and packaging for stable storage.
Why source S23 from Sports Technology Labs
Quality control across the research-compound industry is inconsistent, which makes third-party verification essential. A 2017 analysis published in JAMA examined 44 products marketed online as SARMs and reported wide gaps between labels and contents.
Source: Van Wagoner et al., JAMA, 2017 (ref. 2).
Verified by MZ Biolabs (Tucson, AZ), an accredited US laboratory, via HPLC and mass spectrometry.
Suspended in the highest grade carrier and bottled in America.
Prevents BPA leaching and avoids contamination from external tools.
Transparent business, standard payment methods, no misrepresentation.
What is S23?
S23 is a non-steroidal selective androgen receptor modulator (SARM). Mechanistically, it binds the androgen receptor with high affinity and tissue selectivity, which distinguishes it from steroidal androgens. It is orally bioavailable in study models and was characterized as an experimental compound through programs associated with GTx, Inc. (ref. 1).
S23 remains an experimental research chemical and is supplied strictly for laboratory research. Sports Technology Labs makes no claims regarding its effects, and nothing in this listing should be interpreted as describing outcomes in humans or animals.
Important regulatory information
S23 is an investigational compound. It is not approved by the FDA and is not a dietary supplement, drug, or food. Marketing it for human ingestion is unlawful.
Listed by the World Anti-Doping Agency under S1 (Anabolic Agents — Selective Androgen Receptor Modulators), banned both in- and out-of-competition (ref. 3).
In the United States, S23 is not a controlled substance and may be legally purchased and possessed for laboratory research use.
Sports Technology Labs are chemical suppliers, not medical providers. We do not condone or encourage consumer use of research compounds.
Scientific references
- Narayanan R, Mohler ML, Bohl CE, Miller DD, Dalton JT. Selective androgen receptor modulators in preclinical and clinical development. Nucl Recept Signal. 2008;6:e010.
- Van Wagoner RM, et al. Chemical composition and labeling of substances marketed as SARMs and sold via the internet. JAMA. 2017;318(20):2004–2010.
- WADA Prohibited List (2025), Section S1: Anabolic Agents — Selective Androgen Receptor Modulators (SARMs). WADA.org.
Research use only. All products on this website are intended exclusively for laboratory research and development. They are not for human or animal consumption. These statements have not been evaluated by the U.S. Food and Drug Administration, and these products are not intended to diagnose, treat, cure, or prevent any disease.
