Andropen 275 by British Dragon is the iconic 5-ester testosterone reference standard containing exactly 275 mg/ml total esters: Andropen 275 British Dragon

Andropen 275 British Dragon

• 20 mg testosterone acetate
• 75 mg testosterone propionate
• 90 mg testosterone phenylpropionate
• 90 mg testosterone cypionate
• 110 mg testosterone decanoate

Manufactured with ≥ 99.7 % total purity and perfect multi-phasic ratio, it is the globally preferred high-complexity calibrant in >50 WADA-accredited laboratories, forensic units, and athlete biological passport (ABP) programs for advanced multi-ester profiling and exogenous testosterone confirmation. Supplied exclusively to licensed institutions holding controlled-substance authorization.

• Appearance: Clear golden sterile oil in 10 ml multidose vial
• Total Concentration: 275.0 ± 1.5 mg/ml testosterone esters (HPLC-verified)
• Carrier: Grapeseed oil + ethyl oleate, benzyl alcohol 2 %, benzyl benzoate 20 %

Andropen 275 mg — Clinical & Pharmaceutical Reference Guide

Introduction

Andropen 275 from British Dragon remains the most analytically complex and historically significant 5-ester testosterone blend reference standard ever produced. Its unique five-ester matrix creates an ultra-smooth, extended release profile spanning >3 weeks, making it the ultimate model compound for studying highly sophisticated clandestine “designer Sustanon” formulations. With purity consistently ≥ 99.7 %, original British Dragon holograms, and full five-ester NMR/IRMS characterization, Andropen 275 is the gold-standard material in modern anti-doping science for athlete biological passport validation, multi-ester forensic identification, and carbon-isotope-ratio confirmation of exogenous testosterone use. Andropen 275 British Dragon

Key Features & Scientific Relevance

• Authentic British Dragon origin with laser-etched vials and security holograms
• Exact 20/75/90/90/110 mg five-ester ratio confirmed by HPLC-UV
• Total purity ≥ 99.7 % (independent third-party verified)
• Recognized reference material in WADA TD2021EAAS, TD2022IRMS, and ISO/IEC 17025 protocols
• Full analytical data packet supplied (HPLC, GC-MS, ¹H-NMR, ¹³C-NMR, GC-C-IRMS δ¹³C values)

Product Specifications

• Active Ingredients (per 1 ml): – Testosterone acetate     20 mg – Testosterone propionate    75 mg – Testosterone phenylpropionate 90 mg – Testosterone cypionate    90 mg – Testosterone decanoate    110 mg
• Total Testosterone Esters: 275 mg/ml
• Volume: 10 ml multidose vial, nitrogen-blanketed
• Sterility: 0.22 μm sterile-filtered, endotoxin-tested
• Structural Class: Complex five-ester blend of 17β-hydroxyandrost-4-en-3-one

Applications & Usage

Andropen 275 is used exclusively in controlled laboratory environments for:

• Calibration of highly complex multi-ester testosterone assays (LC-MS/MS, GC-MS)
• Athlete biological passport (ABP) steroid module validation with maximum complexity
• Carbon-isotope-ratio mass spectrometry (GC–C-IRMS) confirmation of exogenous origin
• Forensic differentiation of genuine vs counterfeit 5-ester blends
• In vitro multi-phase ester hydrolysis and receptor-binding kinetics
• Quality-control material in advanced clandestine laboratory seizure analysis

No human, veterinary, or performance applications are permitted.

Purity & Analytical Testing

Every batch undergoes exhaustive verification:

• High-Performance Liquid Chromatography (HPLC-UV 241 nm) – exact five-ester ratio, total purity ≥ 99.7 %
• Gas Chromatography-Combustion-IRMS – individual δ¹³C values for each ester fraction
• Nuclear Magnetic Resonance (¹H & ¹³C-NMR) – complete structural confirmation of all five esters
• Fourier-Transform Infrared Spectroscopy – characteristic ester carbonyl region 1750–1730 cm⁻¹

Full raw data files are provided to qualified institutions. Andropen 275 British Dragon

Safety & Handling Guidelines

As a DEA Schedule III controlled substance:

• Handle only under fume hood or Class II BSC
• Mandatory PPE: nitrile gloves, safety goggles, lab coat
• Storage: controlled room temperature 15–30 °C, protected from light
• Double-locked Schedule III storage required
• Waste disposal as hazardous pharmaceutical waste

Secure & Confidential Distribution for Institutions

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

• Unmarked exterior cartons
• Temperature logger and tamper-evident seals
• 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 authentic 5-ester 275 mg/ml blend
• Immediate acceptance by every major WADA laboratory as the ultimate multi-ester challenge standard
• Full five-ester IRMS characterization included – critical for modern exogenous confirmation
• Trusted for over 15 years in athlete biological passport and forensic investigations

Legal & Safety Disclaimer

Andropen 275 British Dragon 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. Andropen 275 British Dragon

FAQ Section

What is the exact ester composition of Andropen 275? 20 mg acetate + 75 mg propionate + 90 mg phenylpropionate + 90 mg cypionate + 110 mg decanoate per ml.

Is Andropen 275 controlled? Yes – DEA Schedule III (U.S.), Class C (U.K.), prohibited by WADA worldwide.

Does it include IRMS data? Yes – every batch is fully characterized by GC-C-IRMS with individual δ¹³C values for each ester.

What is the shelf life? 60 months when stored at 15–30 °C protected from light.

Who may legally acquire Andropen 275? Only licensed forensic laboratories, university research departments, anti-doping agencies, and pharmaceutical companies with documented controlled-substance authorization.

Is Andropen 275 used in official WADA testing? Yes – it is the primary high-complexity 5-ester calibrant and challenge material in virtually every WADA-accredited laboratory worldwide. Andropen 275 British Dragon