What is Mast P (Drostanolone Propionate)?
Drostanolone Propionate (Mast P) is a DHT-derived anabolic-androgenic steroid esterified with a short propionate chain for rapid release and short half-life. Structurally non-aromatizable, with a 2-methyl group that confers strong, direct androgen receptor binding affinity and historically documented mild antiestrogenic activity at the tissue level, distinct from aromatase inhibition. Research tool for studying high-affinity AR ligand behavior, short-ester pharmacokinetics, and estrogen-receptor-independent antiestrogenic mechanisms. Bulk powder for large-scale AR pharmacology research. Research use only.
Research Applications
High-Affinity AR Ligand Research
2-methyl DHT-derivative binding kinetics, receptor occupancy studies
Short-Ester Pharmacokinetics
Propionate ester hydrolysis rate, short T½ release-profile modeling
Antiestrogenic Mechanism Research
Tissue-level antiestrogenic activity independent of aromatase inhibition
Non-Aromatizing Steroid Research
Aromatase-resistant structure-activity relationships vs testosterone
Quick Specs
| Form | Raw bulk powder (crystalline) |
| Purity | ≥99% by HPLC — every batch |
| CAS Number | 521-12-0 |
| Molecular Formula | C₂₃H₃₆O₃, MW 360.5 |
| Identity | MS molecular weight confirmed — every batch |
| Compound Type | DHT-Derived Non-Aromatizable Androgen (Propionate Ester) |
| COA | Janoshik-independent, publicly verifiable |
| Manufacture | In-house synthesis — Qingdao, China |
| Storage | Room temperature sealed | cool, dry storage |
| Shelf Life | 24 months (unopened) |
