Catalog classification, reference sizes, lab math links, and source-backed data. Educational use only — not medical advice.
Researched for: PepTools vendor-neutral scientific reference catalog
Also known as: 19-nortestosterone, 19-norandrostenolone, nortestosterone, norandrostenolone, estrenolone, 17β-hydroxyestr-4-en-3-one, 4-estren-17β-ol-3-one, Nandrolone CIII
Nandrolone is a 17β-hydroxy steroid derived from the estrane skeleton and classified as a 3-oxo-Δ4 steroid, anabolic agent, androgen, and synthetic anabolic-androgenic steroid. Its validated chemical identity is associated with CAS 434-22-0, PubChem CID 9904, ChEBI CHEBI:7466, and FDA UNII 6PG9VR430D.
Source review pending. This descriptive profile is shown from the available source material as a best-effort educational reference. It has not passed the full verification bar and is not a dosing instruction, medical claim, or treatment recommendation.
Data source: Primary literature, regulator records, trial registries, and identity-specific evidence search
Reflects preclinical/research literature context only. Not a medical claim, dosing instruction, or treatment recommendation.
This record represents unesterified nandrolone rather than a specific ester or pharmaceutical formulation. No common reference sizes were assigned because size conventions apply to particular formulations, analytical standards, or ester preparations rather than to the parent compound as a general catalog fact. Administration route, onset, half-life, solubility, and storage were left unspecified because authoritative values are formulation- and context-dependent or were not reliably established for the parent compound in the sources reviewed.
Supplementary research context only. Not medical advice or a treatment recommendation.
CAS: 434-22-0; molecular formula: C18H26O2; molecular weight: 274.4 g/mol; PubChem CID: 9904; ChEBI: CHEBI:7466; FDA UNII: 6PG9VR430D; InChIKey: NPAGDVCDWIYMMC-IZPLOLCNSA-N; DEA code: 4000.
Nandrolone is the parent active moiety for multiple esterified forms, including nandrolone decanoate and nandrolone phenpropionate. Pharmacokinetic values reported for these esters should not be assigned to the unesterified parent compound. The 2026 WADA Prohibited List identifies nandrolone (19-nortestosterone) and related substances, including esters, as prohibited anabolic-androgenic steroids when administered exogenously. In the United States, DEA reference material lists nandrolone as a Schedule III anabolic steroid.
Reflects published research. Educational reference — not a recommendation for use.
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Research Use Only. All content is for educational and research reference only. Not medical advice, a treatment recommendation, or guidance on human use. Compounds are not FDA-approved drugs unless specifically noted.