Testosterone phenylpropionate Chemical Name: Testosterone Phenylpropionate Drug Class: Injectable Anabolic Steroid Synonym: retandrol CAS No.: 1255-49-8 M.F.: C28H36O3 M.W.: 420.58 Assays: 99.03% Packing: 1kg/foil bag Quality Standards: BP2005 Appearance: White or Almost White Crystalline Powder This particular ester gives us an active life of 4-5 days, falling just between the Propionate (short) and Cypionate (long) versions of testosterone. It also promotes muscle growth, increases bodyweight and appetite. Users have noticed strength and muscle gains. Testosterone improves muscle contraction by increasing the number of motor neutrons in muscle and improves neuromuscular transmission. It also promotes glycogen synthesis providing more fuel for intense workouts thus increasing endurance and strength testosterone Phenylpropionate plays a key role in the development of male reproductive tissue such as the testis and prostates.testosterone Phenylpropionate is conserved through most vertebrates, although fish make a slightly difference from called 11-ketotestosterone.