Testosterone enanthate is an analytical reference standard categorized as an anabolic androgenic steroid. It is an ester of the naturally occurring androgen, testosterone (ISO60154) with a longer half-life.¹ Formulations containing testosterone enanthate have been tested for use in hypogonadism and as a potential male contraceptive.^2,3 Formulations containing it have been associated with higher levels of total cholesterol, low density lipoproteins, and triglycerides and lower levels of high density lipoproteins.⁴ Anabolic steroids, including testosterone enanthate, have been used to enhance physical performance in racehorses and athletes, and methods to detect steroids, their derivatives, and their metabolites have been developed.^5,6 This product is intended for research and forensic applications.