What is S23?
S23 is a nonsteroidal selective androgen receptor modulator (SARM) with high AR binding affinity and strong tissue-selective activity. Among the most potent SARMs, it produces robust anabolic effects in muscle and bone with strong androgenic suppression of the HPG axis (spermatogenesis inhibition at sufficient doses). Research tool for SARM pharmacology, male contraceptive models, and androgen receptor selectivity studies. Research use only.
Research Applications
High-Affinity SARM Pharmacology
AR binding kinetics, agonist efficacy, receptor conformation vs steroidal ligands
Male Contraceptive Research
FSH/LH suppression, spermatogenesis inhibition, reversibility studies
Muscle & Bone Anabolism
Anabolic activity in skeletal muscle and bone without prostate stimulation
SARM Selectivity Profiling
S23 vs other SARMs (LGD-4033, RAD-140, Ostarine) — tissue-specific AR activity
HPG Axis Suppression
Gonadotropin suppression dynamics, testosterone suppression, recovery timeline
Quick Specs
| Form |
C₁₈H₁₃ClF₄N₂O₃ |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
1010396-29-8 |
| Molecular Weight |
MS molecular weight confirmed — every batch |
| Specification |
≥99% by HPLC — every batch |
| Shelf Life |
24 months unopened |
| Storage |
Room temperature sealed | cool, dry storage |
| Manufacture |
In-house synthesis — Qingdao, China |
| Brand |
China |
Frequently Asked Questions
How do I reconstitute this peptide?
QSC research tablets are supplied as pre-dosed oral tablets at the stated concentration. No reconstitution is required. Each tablet is compressed at uniform dose for consistent dosing in research applications.
How should this peptide be stored?
Store at room temperature (15–25°C) in a cool, dry place away from moisture, heat, and direct sunlight. Keep in the original container. Properly stored tablets remain stable for 2–3 years.
What purity is this QSC compound and how is it verified?
QSC research tablets contain active ingredient at ≥99% HPLC purity before tableting, with MS-confirmed identity on every batch. COA is published on the product page and independently verifiable at verify.janoshik.com.
🧪 Peptide Research Tools: Use QSC's free
peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
🌍 Domestic shipping: 🇺🇸 USA 5–7 days
🌏 International shipping: 7–14 days
⚠️ RESEARCH USE ONLY — NOT FOR HUMAN CONSUMPTION
QSC products are strictly for in vitro and in vivo laboratory research.
Safety & Handling
🚫
Not for Human Use
These compounds are for research only.
🥽
PPE Required
Always use appropriate protective equipment.
❄️
Storage Compliance
Follow product-specific storage conditions.
Product-Specific Storage
Room temperature sealed | cool, dry storage
