Sustanon 300 is a multi-ester testosterone reference solution formulated to model both rapid and sustained androgen release kinetics. Each 10 mL vial contains a total concentration of 300 mg/mL testosterone, composed of four esters with differing half-lives to provide a combined immediate- and long-acting profile for laboratory study.

Key Research Features

• Compound: Testosterone blend (Sustanon 300)
• Form: Oil-based injectable reference solution
• Concentration: 300 mg/mL
• Solvent/Carrier: Ethyl Oleate – maintains ester suspension and low viscosity
• Primary research focus: Multi-ester pharmacokinetic modeling and testosterone release-rate comparison

Composition per mL (Reference Blend)

• Testosterone Propionate – 30 mg (fast-acting)
• Testosterone Phenylpropionate – 60 mg (medium-acting)
• Testosterone Isocaproate – 60 mg (intermediate-release)
• Testosterone Decanoate – 150 mg (long-acting)

Research Overview

Sustanon 300 is widely used in release-rate, absorption, and serum-stability studies. The multi-ester composition allows comparative evaluation between short and extended testosterone forms within a single formulation. Its consistent oil suspension in Ethyl Oleate facilitates low-viscosity injection and even dispersion in tissue models.

Reference Sampling Protocol (Educational)

Reference Notes & Handling

• Injection frequency: Weekly administration commonly used in controlled release studies due to blended ester profile.
• Half-life spread: Approx. 2 days (Propionate) → 10 days (Decanoate).
• Viscosity: Low, due to Ethyl Oleate carrier – allows use of thinner gauge needles (23–25 G).
• Storage: Keep sealed, upright, and protected from light at room temperature (<25 °C).

Observed Research Outcomes

• Multi-phase release curve replicating both rapid onset and extended serum maintenance.
• Stable suspension clarity and low particulate formation during ambient storage.
• Reduced injection-site viscosity compared to castor- or sesame-oil formulations.

Kit Contents

• 1 × 10 mL vial Sustanon 300 mg/mL

Why Choose EU Pharmaceuticals?

EU Pharmaceuticals provides high-purity reference injectables designed for pharmacokinetic and compound-stability modeling. All formulations are HPLC and GC-verified to ensure consistent concentration, clarity, and reproducibility in laboratory environments.

For laboratory, educational, and research use only. Not for human or veterinary ingestion or therapeutic application. No medical or performance claims are made or implied. Buyer assumes responsibility for lawful handling and regulatory compliance.