Key highlights
Product specifications
| Compound Class | Non-steroidal Anti-androgen (NSAA) · Androgen Receptor Antagonist |
|---|---|
| Concentration | 50 mg/mL |
| Composition | USP-grade solvent base, RU-58841 (≥99% purity) |
| CAS Number | 154992-24-2 |
| Chemical Formula | C17H18F3N3O3 |
| Molar Mass | 369.3 g/mol |
| Synonyms | RU-58841, PSK-3841, HMR-3841 |
| Format | Topical liquid, spray applicator (~1/6 mL per pump) |
| Volume | 30 mL per bottle (1,500 mg total) |
| Verified Purity | Batch-tested to 99.31% (HPLC) |
| Terms | For laboratory research use only. Not for human or animal consumption. |
Independently verified99.31% 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 spray applicator dispensing approximately 1/6 mL per pump for measured application.
- Tamper-proof seal to ensure integrity in transit.
- Handle as a laboratory chemical using appropriate personal protective equipment and standard lab practices.
Why source RU-58841 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.
Bottled in glass to prevent leaching of plasticizers such as BPA.
Transparent business, standard payment methods, no misrepresentation.
What is RU-58841?
RU-58841 is a non-steroidal anti-androgen (NSAA) that acts as an antagonist of the androgen receptor. Mechanistically, it binds the androgen receptor and blocks androgen binding without reducing circulating androgen levels. It was first developed by French researchers (Roussel Uclaf) and is formulated for topical application in research contexts (ref. 1).
RU-58841 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
RU-58841 is an investigational compound. It is not approved by the FDA, cannot be prescribed or sold at pharmacies, and is not a dietary supplement, drug, or food. Marketing it for human use is unlawful.
This preparation is intended for laboratory research and development by qualified professionals, not for introduction into humans or animals by any route.
In the United States, RU-58841 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
- National Center for Biotechnology Information. PubChem Compound Summary for RU-58841 (CAS 154992-24-2): molecular formula, molecular weight, and classification. PubChem, National Library of Medicine.
- 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.
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.
