Oxandrolone is a synthetic anabolic–androgenic steroid (AAS) derived from dihydrotestosterone (DHT). The RAW API form is a pharmaceutical active ingredient Name: Oxandrolone Chemical class: Anabolic–androgenic steroid (AAS), DHT derivative CAS Number: 53-39-4 Molecular Formula: C₁₉H₃₀O₃ Molecular Weight: ~306.44 g/mol Description: 17-alpha-alkylated oral anabolic steroid API Appearance White to off-white crystalline powder Odorless or nearly odorless Practically insoluble in water Where approved by regulators, oxandrolone API has been used to manufacture prescription medicines for: Weight gain after severe weight loss due to: Surgery Chronic infection Severe trauma Catabolic states (muscle wasting) Burn injury recovery (to help preserve lean body mass) Certain genetic growth disorders Oxandrolone is prohibited in competitive sports, so the API is used as: Reference standards Calibration materials Analytical validation compounds Oxandrolone enters target cells such as skeletal muscle and bone It binds to the androgen receptor (AR) in the cytoplasm The oxandrolone–AR complex translocates into the cell nucleus .