Testosterone Base / Testosterone no ester Powder Chemical name: 4-Androsten-17β-ol-3-one Synonyms:17beta-Hydroxyandrost-4-en-3-one CAS: 58-22-0 EINECS: 200-370-5 Assay: 99% min. Molecular formula: C19H28O2 Packing: foil bag or tin. Appearance: white or off-white crystalline powder Usage: Pharmaceutical material, Steroid hormone, Anabolin. For disease-free testosterone replacement therapy, male menopause, impotence and other diseases treatment.