Nandrolone Phenylpropionate Powder

Nandrolone Phenylpropionate (NPP) Powder – Technical Overview & Specifications

Nandrolone Phenylpropionate (NPP) is a short-ester derivative of nandrolone, supplied as a high-purity white crystalline powder. Known for its relatively fast release profile compared to longer esters, NPP is widely referenced in pharmaceutical research and formulation contexts.

This compound exhibits strong anabolic properties with moderate androgenic activity, making it a subject of interest in studies related to muscle tissue development and metabolic function. The phenylpropionate ester allows for a shorter half-life, resulting in more controlled pharmacokinetics.

Manufactured to high purity standards (typically ≥98% by HPLC), Nandrolone Phenylpropionate powder is characterized by excellent stability when stored properly in cool, dry, and light-protected conditions.

Chemical Identification

• Chemical Name: Nandrolone 17β-phenylpropionate
• Synonyms: NPP, Durabolin (short ester variant)
• Molecular Formula: C₂₇H₃₄O₃
• Molecular Weight: ~406.56 g/mol
• CAS Number: 62-90-8

Physical Characteristics

• Appearance: White to off-white crystalline powder
• Solubility:
  • Soluble in oils (e.g., cottonseed oil, sesame oil)
  • Slightly soluble in alcohol
  • Practically insoluble in water
• Melting Point: ~95–99°C (can vary slightly depending on purity)
• Odor: Odorless or faint characteristic smell

Purity & Quality (Typical Lab Specs)

• Assay (HPLC): ≥ 98%
• Loss on Drying: ≤ 0.5%
• Residual Solvents: Within acceptable pharmacopeia limits
• Heavy Metals: ≤ 10 ppm
• Microbial Limits: Meets sterile or non-sterile standards depending on intended use

Pharmacological Classification

• Class: Anabolic steroid
• Base Compound: Nandrolone (19-nortestosterone derivative)
• Ester Type: Phenylpropionate (short-to-medium acting ester)

Pharmacokinetics (General)

• Half-life: ~2–4 days (intramuscular injection when formulated)
• Release Profile: Faster than decanoate esters, allowing more frequent dosing
• Anabolic Rating: High
• Androgenic Rating: Low to moderate

Typical Applications

• Used in research or pharmaceutical compounding
• Historically prescribed for:
  • Anemia
  • Muscle wasting conditions
  • Osteoporosis

Storage Conditions

• Store in a cool, dry place
• Protect from light and moisture
• Recommended temperature: 2–8°C for long-term stability

Stability

• Stable under recommended storage conditions
• Sensitive to prolonged exposure to heat, light, and air

Regulatory Status

• Classified as a controlled substance in many countries
• Use without prescription is illegal in numerous jurisdictions

Safety Notes

• Not intended for human consumption without medical supervision
• Potential side effects include hormonal imbalance, cardiovascular strain, and endocrine suppression
• Handling should follow proper laboratory safety protocols