🔬 S‑23 Injectable – For Research Use Only

🧪 Chemical & Mechanistic Profile

• Name: S‑23 (Investigational Selective Androgen Receptor Modulator)

• IUPAC: (2S)-N-(4-cyano-3‑trifluoromethylphenyl)‑3‑(3‑fluoro‑4‑chlorophenoxy)‑2‑hydroxy‑2‑methyl‑propanamide

• CAS #: 1010396‑29‑8

• Molecular Weight/Form: C₁₈H₁₃ClF₄N₂O₃; preclinical profiles show potent full agonism with Ki ≈1.7 nM reddit.com+15en.wikipedia.org+15peptidessupply.com+15

• Developer: GTX, Inc., originally studied as a hormonal male contraceptive hqsarms.com+9en.wikipedia.org+9crazybulk.co.uk+9

⚙️ Research Applications & Animal Data

• Anabolic effects: Significant lean mass gains and fat loss in rodent models; potent suppression of LH/FSH and reversible infertility unfilteredonline.com

• Preclinical dosing: Typically 0.1–3 mg/kg in rats, 8–12 week cycles with recovery observed in 4–6 weeks post-cessation peptidessupply.com+1en.wikipedia.org+1

• Bioavailability: Oral >90%; anecdotal reports suggest injectables at 5–50 mg/day used, some suggest 5–10 mg/day for humans reddit.com

💉 Injectable Formulation & Handling

• Form: Supplied as ≥98% purity sterile injectable in suitable vehicle (e.g., DMSO + aqueous buffer)

• Concentration examples: 10–50 mg/mL; adjust based on animal model/species supremelabsusa.com

• Storage: –20 °C long-term; short-term refrigerated (2–8 °C); protect from light

• Handling: Use aseptic technique, single-use vials; label clearly “For Research Use Only—Not for human or veterinary use”