≥99% HPLC Purity MS Confirmed Janoshik COA In-House SPPS 8-Region Worldwide Shipping
Compound type: DHT-Derived AAS — Non-Aromatising AR Agonist + Aromatase Inhibitor CAS Number: 521-12-0
What is Masteron (Drostanolone)?
Masteron (Drostanolone) is a 2α-methylated DHT derivative available in propionate (~2-day) and enanthate (~5-day) ester forms. It binds androgen receptor with moderate affinity, does not aromatise (DHT derivative), and uniquely inhibits aromatase (CYP19A1) directly — providing both androgenic and anti-oestrogenic activity in a single compound. The anti-aromatase activity is independent of AR binding — Masteron acts as a competitive aromatase inhibitor, reducing oestrogen synthesis in peripheral tissue. This dual mechanism makes Masteron a unique research tool for studying concurrent AR agonism + oestrogen suppression.
Research Applications
Dual AR Agonism + Aromatase Inhibition
Unique compound that simultaneously binds AR and inhibits CYP19A1
Anti-Oestrogenic Androgen
DHT-derived — no aromatisation; combined direct oestrogen suppression via aromatase
Ester Comparison
Propionate (~2-day) vs. Enanthate (~5-day) half-life comparative pharmacokinetics
Lean Androgenic Research
Non-water-retaining androgenic research without oestrogen-mediated effects
Masteron (Drostanolone) is a 2α-methylated DHT-derived AAS that uniquely combines AR agonism with direct aromatase inhibition. It is non-aromatising by structure and additionally suppresses oestrogen synthesis via CYP19A1 competitive inhibition. Available in propionate (~2-day) and enanthate (~5-day) ester forms.
How is Masteron supplied?
QSC Masteron is supplied as a ready-to-use oil-based injectable solution in both propionate and enanthate forms. No reconstitution required. Store at room temperature away from direct sunlight.
What purity is QSC Masteron?
QSC Masteron (propionate and enanthate) is ≥99% HPLC pure with MS-confirmed identity on every batch. COA verifiable at verify.janoshik.com.
Research Use Only: All QSC compounds are sold strictly for laboratory research purposes only. Not for human consumption, veterinary use, or any other application. Researchers are responsible for compliance with local regulations.
QSC Network
Compound reference, COA verification, and regional warehouse information across the QSC network.
