Used primarily in veterinary medicine to promote growth and weight gain in livestock, particularly cattle. It acts as a long-acting androgenic hormone, supporting muscle development and improving feed efficiency. Also employed in research settings to study androgen effects and hormone delivery systems due to its slow release profile. Historically used in human medicine for hormone replacement therapy to treat low testosterone levels, stimulating secondary male characteristics such as muscle growth, hair development, and genital maturation, but largely replaced by other testosterone esters (e.g., enanthate, cypionate) due to their superior pharmacokinetics and longer duration of action.