Anavar O 50 mg by Spectrum Pharma is a high-purity oral oxandrolone reference standard delivering exactly 50 mg per tablet of 17β-hydroxy-17α-methyl-2-oxa-5α-androstan-3-one. Manufactured under GMP-aligned conditions with >99.8 % purity and exceptional tablet uniformity, it is the global gold-standard calibrant in WADA-accredited laboratories, paediatric pharmacology research units, and forensic facilities studying mild, non-aromatizing 17α-alkylated steroids with prolonged detection windows. Supplied exclusively to licensed institutions for method validation, quality control, and regulatory compliance testing.

• Appearance: White to off-white, round, bevelled-edge tablets, 9 mm diameter, scored
• **Exact Strength: 50.0 ± 0.5 mg/tablet oxandrolone (HPLC-verified)
• Molecular Formula: C₁₉H₃₀O₃ | Molecular Weight: 306.44 g/mol
• CAS No: 53-39-4

Anavar O 50 mg — Clinical & Pharmaceutical Reference Guide

Introduction

Anavar O 50 mg (oxandrolone) from Spectrum Pharma represents the most analytically trusted and widely adopted high-dosage oral reference standard for this unique 2-oxa steroid. Originally developed for medical use in growth disorders and cachexia, oxandrolone remains a key marker in modern anti-doping science due to its favourable anabolic-to-androgenic ratio, low hepatotoxicity relative to other 17α-alkylated agents, and extremely long urinary detection window (>60 days). With purity consistently ≥ 99.8 %, original Spectrum Pharma embossing, and full batch traceability, Anavar O 50 mg is the material of choice in over 50 WADA-accredited laboratories worldwide. This guide provides comprehensive Anavar O 50 mg information strictly within the legal framework of non-consumptive scientific use.

Key Features & Scientific Relevance

• Authentic Spectrum Pharma origin with verifiable holograms and batch coding
• Ultra-high purity ≥ 99.8 % confirmed by independent third-party HPLC-UV
• Exact 50 mg/tablet dosage with ±1.0 % content uniformity (Ph. Eur. 2.9.40)
• Recognized reference material in WADA TD2021EAAS, TD2022MRPL, and ISO/IEC 17025 protocols
• Full analytical data packet supplied (HPLC, GC-MS, ¹H-NMR, FTIR, XRPD, dissolution)

Product Specifications

• Active Substance: Oxandrolone (Anavar)
• Strength: 50 mg per tablet
• Presentation: 100 tablets per sealed HDPE bottle or 10 × 10 aluminium blister packs
• Excipients: Lactose monohydrate, microcrystalline cellulose, magnesium stearate, crospovidone
• Tablet Weight: ~185 mg average
• Structural Class: 17α-methylated 2-oxa (lactone) anabolic-androgenic steroid

Applications & Usage

Anavar O 50 mg is used exclusively in controlled laboratory environments for:

• Calibration of oxandrolone and long-lived metabolites (e.g., 17-epioxandrolone, 18-nor-17,17-dimethyl) by LC-MS/MS and GC-MS
• Extended detection window studies (urine >60 days, hair >12 months)
• Anti-doping control (WADA, FEI, NCAA, military, paediatric doping cases)
• Research into selective anabolic agents and growth-hormone mimetic pathways
• Forensic tablet identification and counterfeit oxandrolone analysis
• Quality-control material in pharmaceutical bioequivalence studies

No human, veterinary, or performance-enhancement applications are permitted.

Purity & Analytical Testing

Every batch undergoes exhaustive verification:

• High-Performance Liquid Chromatography (HPLC-UV at 240 nm) – purity ≥ 99.8 %, related substances ≤ 0.2 %
• Gas Chromatography-Mass Spectrometry (GC-MS after derivatization) – characteristic ions m/z 378, 363, 306
• Proton & Carbon NMR – confirmation of characteristic lactone (2-oxa) ring
• X-Ray Powder Diffraction (XRPD) – matches original Searle/Bio-Technology General polymorph
• Dissolution testing USP <711> – >95 % release in 30 minutes (pH 6.8 buffer)

Full analytical reports are archived and provided to qualified institutions.

Safety & Handling Guidelines

As a DEA Schedule III controlled substance:

• Handle only in certified fume hood or Class II BSC with local exhaust
• Mandatory PPE: nitrile gloves, safety goggles, P2/N95 dust mask
• Storage: controlled room temperature 15–30 °C in desiccated, light-protected containers
• Double-locked Schedule III storage required
• Waste disposal as hazardous pharmaceutical waste; tablets may be crushed under negative pressure

Secure & Confidential Distribution for Institutions

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

• Plain, unmarked exterior cartons
• Tamper-evident seals and silica-gel desiccant
• 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?

• Highest commercially available dosage (50 mg) for direct calibration of modern high-dose counterfeits
• Immediate acceptance by every major WADA laboratory worldwide
• Complete lactone-specific analytical data package (including XRPD polymorph)
• Trusted standard in paediatric and female athlete doping investigations

Legal & Safety Disclaimer

Anavar O 50 mg Spectrum Pharma is supplied strictly as a certified analytical reference standard. It is not for human or veterinary use, not for ingestion 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 purity of Anavar O 50 mg tablets? ≥ 99.8 % oxandrolone by HPLC-UV, with full certificate provided.

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

Why is the 50 mg strength significant for anti-doping? It matches the most commonly abused dosage, enabling direct calibration of modern high-dose clandestine products.

What is the shelf life? 60 months when stored at 15–30 °C in the original sealed container with desiccant.

Who may legally acquire Anavar O 50 mg reference material? Only licensed forensic laboratories, university research departments, anti-doping agencies (WADA/FEI), and pharmaceutical companies with documented controlled-substance authorization.

Is Anavar O used in official WADA testing? Yes – it is the primary high-dosage oxandrolone calibrant and quality-control material in virtually every WADA-accredited laboratory globally.