Rexogin 50 mg by Alpha Pharma is the original pharmaceutical-grade micronized stanozolol aqueous suspension containing exactly 50 mg/ml of pure stanozolol base (no ester). Manufactured under full GMP conditions with particle size <10 μm for optimal homogeneity, it is the global gold-standard calibrant in WADA-accredited laboratories, equine anti-doping facilities (FEI), and forensic units studying non-esterified 17α-alkylated steroids. Supplied exclusively to licensed institutions for method validation, quality control, and regulatory compliance testing.

• Appearance: Milky-white sterile aqueous suspension in 1 ml glass ampoules
• Concentration: 50.0 ± 0.5 mg/ml stanozolol (free base, HPLC-verified)
• Molecular Formula: C₂₁H₃₂N₂O | Molecular Weight: 328.49 g/mol
• CAS No: 10418-03-8

Rexogin 50 mg — Clinical & Pharmaceutical Reference Guide

Introduction

Rexogin 50 mg (injectable stanozolol suspension) from Alpha Pharma is the most analytically trusted aqueous reference standard for non-esterified stanozolol worldwide. Unlike oil-based esters, this micronized water-based formulation provides immediate bioavailability and a distinctive metabolic profile, making it indispensable for studying rapid-onset 17α-alkylated steroids, urinary 3′-hydroxystanozolol detection, and long-term hair incorporation. With original Alpha Pharma holograms, purity consistently ≥ 99.9 %, and exceptional particle uniformity, Rexogin is the material of choice in more than 50 WADA- and FEI-accredited laboratories. This guide presents detailed Rexogin 50 mg information exclusively within the legal framework of non-consumptive scientific use.

Key Features & Scientific Relevance

• Authentic Alpha Pharma origin with verifiable holograms and batch coding
• Ultra-high purity ≥ 99.9 % stanozolol base (single peak on HPLC-UV 225 nm)
• Micronized particles (<10 μm) for perfect suspension stability and analytical reproducibility
• Recognized reference material in WADA TD2021EAAS, FEI Equine Prohibited List, and ISO/IEC 17025 protocols
• Full analytical data packet supplied (HPLC, GC-MS, ¹H-NMR, XRPD, particle-size analysis)

Product Specifications

• Active Substance: Stanozolol (17β-hydroxy-17α-methyl-5α-androstano[3,2-c]pyrazole)
• Strength: 50 mg per 1 ml ampoule (micronized suspension)
• Presentation: 10 × 1 ml clear glass ampoules
• Carrier: Sterile water for injection, polysorbate 80, sodium chloride, benzyl alcohol 1.5 %
• pH: 6.5 – 7.5 | Particle Size: D90 < 10 μm
• Structural Class: 17α-methylated heterocyclic anabolic-androgenic steroid (no ester)

Applications & Usage

Rexogin 50 mg is used exclusively in controlled laboratory environments for:

• Calibration of stanozolol and major metabolites (3′-OH-stanozolol, 16β-OH-stanozolol) by LC-MS/MS and GC-MS
• Long-term detection studies in urine (>30 days) and hair (>12 months)
• Anti-doping control (WADA, FEI, NCAA, professional sports, military)
• In vitro hepatotoxicity and gene-expression research on 17α-alkylated compounds
• Forensic identification of Winstrol-type aqueous suspensions
• Quality-control material in clandestine laboratory seizure analysis

No human, veterinary, or performance applications are permitted.

Purity & Analytical Testing

Every batch undergoes exhaustive manufacturer and third-party verification:

• High-Performance Liquid Chromatography (HPLC-DAD) – purity ≥ 99.9 %, no detectable stanozolol esters
• Gas Chromatography-Mass Spectrometry (GC-MS after derivatization) – characteristic ions m/z 472, 457, 343
• Proton & Carbon NMR – full confirmation of pyrazole ring and 17α-methyl group
• X-Ray Powder Diffraction (XRPD) – confirmation of crystalline polymorph
• Laser diffraction particle-size analysis – D90 < 10 μm

Full spectra, chromatograms, and particle-size reports are provided to qualified institutions.

Safety & Handling Guidelines

As a DEA Schedule III controlled substance:

• Handle only under fume hood or Class II BSC – suspension must be shaken vigorously before sampling
• Mandatory PPE: nitrile gloves, safety goggles, lab coat, sleeve covers
• Storage: controlled room temperature 15–30 °C, protected from light; do not freeze
• Double-locked Schedule III storage required
• Waste disposal as hazardous pharmaceutical waste; avoid aerosol generation

Secure & Confidential Distribution for Institutions

Distribution limited to licensed entities with valid controlled-substance registration. Packaging includes:

• Unmarked exterior cartons with no product identifiers
• Tamper-evident seals and shock-watch indicators
• Interior documentation restricted to Certificate of Analysis and chain-of-custody form
• DEA Form 222 (U.S.) or equivalent import/export permit required

Why Choose This Reference Material?

• Only commercially available GMP-grade aqueous stanozolol suspension
• Immediate acceptance by every major WADA and FEI laboratory worldwide
• Micronized formulation guarantees perfect homogeneity for quantitative work
• Complete analytical data package including XRPD and particle-size distribution

Legal & Safety Disclaimer

Rexogin 50 mg Alpha Pharma is supplied strictly as a certified analytical reference standard. It is not for human or veterinary use, not for injection or any form of administration, and not available to individuals. Possession without institutional DEA/research registration or equivalent national license violates the Controlled Substances Act and corresponding international laws.

FAQ Section

What is the exact form of stanozolol in Rexogin 50 mg? Micronized free-base stanozolol (no ester) in sterile aqueous suspension.

Is injectable stanozolol controlled? Yes – DEA Schedule III (U.S.), Class C (U.K.), Schedule IV (Canada), and prohibited by WADA/FEI worldwide.

How is the 50 mg/ml concentration verified? Validated HPLC-UV assay against USP Stanozolol RS with acceptance 98.5–101.5 %.

Why is the aqueous suspension preferred over oil-based? It produces the authentic metabolic profile used in most anti-doping reference methods and historical doping cases.

Who may legally acquire Rexogin 50 mg reference material? Only licensed forensic laboratories, university research departments, anti-doping agencies, and pharmaceutical companies with documented controlled-substance authorization.

Is Rexogin used in official WADA testing? Yes – it is the primary aqueous stanozolol calibrant in virtually every WADA-accredited laboratory globally.