Pregnenolone Synonyms: DELTA5-PREGNEN-3BETA-OL-20-ONE CAS: 145-13-1 MF: C21H32O2 MW: 316.48 Chemical Properties: white to off-white powder Product Implementation Quality Standard: Enterprise Standard Usage: Pregnenolone is a steroid hormone involved in the steroidogenesis of progesterone, mineralocorticoids, glucocorticoids, androgens, and estrogens. As such it is a prohormone. Pregnenolone is a GABAA antagonist and increases neurogenesis in the hippocampus.