English Synonyms: 3,5(10)-triene-3,17-diol(17-beta)-estra-17-pentanoate;atladiol;b-estradiol17-valerate;deladiol;delahormoneunimatic;delestrogen;delestrogen4x;dura-estradiol CAS NO.: 979-32-8 Assay: 98% Molecular Formula:C23H32O3 Molecular Weight:356.5 Packing:1kg,5kg/foil bag,25kg/drum Appearance:white fine powder Usage: Estradiol (E2 or 17β-estradiol) (also oestradiol) is a sex hormone. Estradiol is the predominant sex hormone present in females. It is also present in males, being produced as an active metabolic product of testosterone. It represents the major estrogen in humans. Estradiol has not only a critical impact on reproductive and sexual functioning, but also affects other organs including the bones.