Metribolone (5mg/mL), also known as R-1881, is an extremely potent non-aromatizable androgen used in high-affinity receptor binding studies and androgen signaling research. It is a 17α-alkylated derivative of Trenbolone with strong agonistic activity on the androgen receptor, making it a preferred compound in competitive binding assays.

Due to its high potency and stability, Metribolone is often used in vitro or in tightly controlled in vivo research settings for mapping androgen receptor activity and evaluating gene transcription pathways. Its use requires precise dosing and ethical oversight due to its strong biological activity.

Format: Sterile oil-based solution, 5mg/mL
Purity: ≥99% (HPLC-verified)
Molecular Formula: C19H24O2
Storage Recommendations: Store at 2°C–8°C; protect from light
Intended Research Use: Receptor binding assays, androgen-responsive gene expression models, in vitro hormone mapping
**For Research Use Only. Not for human consumption.