What is S23?
S23 is one of the most potent SARMs — near-complete HPG axis suppression at sufficient doses. High AR affinity with strong tissue selectivity. Studied for male contraceptive models (spermatogenesis inhibition), high-potency SARM pharmacology, and comparative AR selectivity research. Research use only.
Research Applications
Male Contraceptive Research
Spermatogenesis inhibition, FSH suppression, reversibility studies
High-Potency SARM AR Pharmacology
Near-complete AR occupancy — ceiling pharmacology, Emax characterisation
HPG Axis Suppression
LH/FSH suppression depth, duration, recovery — most suppressive SARM model
SARM Potency Ranking
S23 vs RAD-140, LGD-4033 — comparative potency, receptor affinity ladder
Anabolic Tissue Research
Muscle and bone anabolism at high-affinity SARM occupancy
Quick Specs
| Form |
C₁₈H₁₃ClF₄N₂O₃, MW 416.8 |
| 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 raw powder compounds are supplied as bulk crystalline or amorphous powder in a sealed, labelled container at the stated quantity. No reconstitution is required — the powder is ready for weighing and use 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 light. Keep in the original sealed container. Properly stored raw powder remains stable for 2–3 years.
What purity is this QSC compound and how is it verified?
All QSC raw powder compounds are tested to ≥99% purity by HPLC on every production batch, with MS-confirmed identity. 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
