7α-Methyl-3,3-dimethoxy-5(10)-estren-17-one is a key steroidal intermediate in organic synthesis. It features a 7α-methyl group and a 3,3-dimethoxy ketal protecting group on the A-ring of a 5(10)-estrene skeleton. This specific structural motif, particularly the 7α-methyl substitution, is crucial for imparting desired biological activity in certain synthetic steroid derivatives. This compound is primarily used in the pharmaceutical industry for the synthesis of Tibolone, a synthetic steroid with estrogenic, progestogenic, and androgenic properties used in hormone replacement therapy (HRT) for postmenopausal women. The 7α-methyl group is a defining structural feature of Tibolone and its active metabolites. The 3,3-dimethoxy group serves as a protected form of a 3-keto function, which is essential for further synthetic transformations towards the final active pharmaceutical ingredient (API). As a high-value chiral building block, its synthesis and purity are critical for the production of Tibolone. Handling requires standard precautions for fine chemicals, and it should be stored under inert conditions to preserve stability.