QSC RESEARCH GRADE
≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SynthesisChina Warehouse
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 | Raw bulk powder (crystalline/amorphous) |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 401900-40-1 |
| Molecular Formula | C₁₉H₁₈F₃N₃O₆, MW 441.4 |
| Identity | MS molecular weight confirmed — every batch |
| Compound Type | Selective Androgen Receptor Modulator (SARM) — Partial Agonist |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house synthesis — Qingdao, China |
| Storage | Room temperature sealed | cool, dry storage |
| Shelf Life | 24 months (unopened) |
