What is Andarine (S4)?
Andarine (S4) is a partial AR agonist SARM originally developed by GTx. Produces anabolic activity in muscle and bone via partial agonism — lower Emax than full agonists. Notable for retinal AR binding at higher doses. Research tool for partial agonism pharmacology, tissue selectivity studies, and SARM comparative research. Research use only.
Research Applications
Partial AR Agonism
Partial vs full agonist receptor pharmacology — Emax, efficacy, coactivator
Retinal AR Research
Vision disturbance mechanism — AR expression in retinal tissue, S4 binding
SARM Selectivity
Muscle:prostate selectivity ratio, tissue-specific partial agonism
Dose-Response Research
S4 partial agonist curve — Emax plateau, minimal efficacy dose
Comparative SARM Panel
S4 vs Ostarine, LGD-4033, RAD-140 — partial vs full agonist tissue outcomes
Quick Specs
| Form |
C₁₉H₁₈F₃N₃O₆, MW 441.4 |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
401900-40-1 |
| 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
