Support & Solvents
Injection Kit
50 syringes + 100 padsEverything required to safely reconstitute and inject reconstituted peptides — 50 sterile insulin syringes plus 100 alcohol prep pads.
$25
Lyophilized · 50 mg/mL × 30 mL
Skin & Cosmetic
50 mg/mL × 30 mL
RU-58841 5% Topical Solution — 30mL (50 mg/mL)
Non-steroidal AR antagonist · Topical · Strong local activity · Minimal systemic
Premium Grade
Topical
Non-steroidal androgen receptor antagonist — topical compound for the androgenetic-alopecia pathway.
- CAS Number
- 154992-24-2
- Molecular Weight
- 369.34 Da
- Purity
- ≥ 99.0% (HPLC)
- Storage
- −20 °C, lyophilized
Amino Acid Sequence
4-(4,4-Dimethyl-3-(4-hydroxybutyl)-5-oxo-2-thioxo-1-imidazolidinyl)-2-(trifluoromethyl)benzonitrile
Free over $59$7.99 to US (48h) · $14.99 worldwide (5 business days)
Discreet PackagingPlain insulated mailer, no compound name on the outside.
Certificate of Analysis
Per-lot analytical report — HPLC, ESI-MS, LAL endotoxin, heavy metals, sterility
Current lotRUT822
Released2026-04-17
HPLC purity99.16%
Endotoxin (LAL)Pass · < 0.5 EU/mg
About RU-58841 5% Topical
Buy RU-58841 5% topical at IGF1 Shop. RU-58841 is a small-molecule, non-steroidal selective androgen receptor antagonist with strong local activity and minimal systemic absorption — one of the most-studied topical compounds for the androgenetic-alopecia pathway. Each bottle contains 50mg/mL (5% w/v) in an ethanol/propylene glycol vehicle, 30mL total (1,500mg total compound). HPLC ≥99% pure, per-lot COA included. CAS 154992-24-2.
Also known as: RU-58841 · RU58841 · Topical AR antagonist
RU-58841 5% Topical — Mechanism & Specifications
RU-58841 is a small-molecule, non-steroidal selective androgen receptor antagonist with strong local activity and minimal systemic absorption. Provided as a 5% w/v solution (50 mg/mL) in an ethanol/propylene glycol vehicle, 30 mL bottle (1 500 mg total compound).
Quality & release criteria
Every lot of RU-58841 5% Topical is released only after passing reverse-phase HPLC (≥ 99% area purity at 220 nm against a reference standard), ESI mass spectrometry confirmation of molecular weight, and Limulus Amebocyte Lysate (LAL) endotoxin testing below 0.5 EU/mg. The lot-specific Certificate of Analysis is provided with the order and available on request before purchase.
$75
3 vials · $25/vial
FAQ
RU-58841 5% Topical — Frequently asked questions
What is RU-58841?
RU-58841 is a non-steroidal selective androgen receptor antagonist developed for topical application. Its key advantage is strong local activity at the scalp follicle with minimal systemic absorption, unlike oral 5α-reductase inhibitors.
How is RU-58841 applied?
RU-58841 5% solution is applied topically to clean, dry scalp once daily before bed. The 5% concentration delivers approximately 50mg per 1mL applied. A 30mL bottle provides a 30-day supply at 1mL/day typical usage.
How is RU-58841 stored?
Store RU-58841 in its original dropper bottle at room temperature, protected from light. Do not refrigerate — the ethanol/propylene glycol vehicle can precipitate at low temperatures. Stable for 12 months sealed.
How is RU-58841 tested?
RU-58841 raw material is HPLC ≥99% pure, ESI-MS verified before formulation. Each bottle ships with the COA for the active ingredient lot, traceable to the synthesis batch number.
