What is Fluoxymesterone (Halotestin)?
Fluoxymesterone (Halotestin) is one of the most potent oral androgens — a 17α-methylated, 9α-fluorinated testosterone derivative with extremely high AR binding affinity and androgenic potency. Does not aromatise due to 11β-hydroxyl group. Research tool for high-potency AR agonism, haematological androgen effects (erythropoiesis), and extreme androgenic activity studies. Research use only.
Research Applications
High-Potency AR Agonism
Extreme androgenic potency — AR binding affinity studies, gene transactivation
Fluorinated Steroid Pharmacology
9α-fluoro group effect on metabolic stability, AR affinity, receptor selectivity
Erythropoiesis Research
Androgenic EPO upregulation, haematocrit response to potent oral androgens
Hepatotoxicity Studies
17α-methyl oral AAS — high-dose hepatic enzyme induction, ALT/AST markers
Comparative High-Potency AAS
Fluoxymesterone vs methylstenbolone, methyltestosterone — potency ranking
Quick Specs
| Form |
C₂₀H₂₉FO₃, MW 336.4 |
| Purity |
≥99% by HPLC — every batch |
| CAS Number |
76-43-7 |
| 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
