CAS 50-28-2 appears in our catalog under these names: b-Estradiol, 50 g, Estradiol (Estradiol Valerate EP Impurity A, Estriol EP Impurity D, Ethinylestradiol EP Impurity D), Estradiol Benzoate Impurity 1 (Estradiol Benzoate EP Impurity A), Estradiol Valerate Impurity 1 (Estradiol Valerate EP Impurity A), Estriol Impurity 4 (Estriol EP Impurity D). Offered by: Roth, Chemat Brand, Hubei YoungXin, TRC, Lipomed. Available pack sizes: 50g, on request, 10mg, 25mg, 50mg, 100mg, 200mg, 1g.