A synthetic steroidal estrogen and a derivative of estradiol, Ethinylestradiol is used as a formulation in Combine oral contraceptives. Also known as EE2 it is used in the hormone replacement therapy in menopause , acne, and cancer (breat and prostrate). Reference standards of Ethinylestradiol API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
(8R,9S,13S,14S,16R)-3,16-Bis((tert-butyldiphenylsilyl)oxy)-13-methyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005230
CAS :
Molecular Formula : C50H58O3Si2
Molecular Weight : 763.18
(8R,9S,13S,14S,16R)-16-Hydroxy-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl acetate
Catalogue No.:PAI 05 005231
Molecular Formula : C20H24O4
Molecular Weight : 328.41
(8R,9S,13S,14S,16R,17S)-17-Hydroxy-13-methyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16-diyl diacetate
Catalogue No.:PAI 05 005232
Molecular Formula : C27H36O5Si
Molecular Weight : 468.67
(8R,9S,13S,14S,16R,17S)-3,17-Dihydroxy-13-methyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-16-yl acetate
Catalogue No.:PAI 05 005233
Molecular Formula : C25H34O4Si
Molecular Weight : 426.63
Mixture of Ethinyl Estradiol Dimer Impurity 1 and Ethinyl Estradiol Dimer Impurity 2
Catalogue No.:PA 05 0461012
Molecular Formula : C40H46O4
Molecular Weight : 590.8
16-Ethylidene-Estrone
Catalogue No.:PA 05 0461013
Molecular Formula : C20H24O2
Molecular Weight : 296.41
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