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.
Ethinylestradiol
Catalogue No.:PA 05 46000
CAS :
Molecular Formula : C20H24O2
Molecular Weight : 296.40
17β-Ethinylestradiol
Catalogue No.:PA 05 46010
19-Nor-17α-pregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-diol
Catalogue No.:PA 05 46020
Molecular Formula : C20H22O2
Molecular Weight : 294.39
3-Hydroxyestra-1,3,5(10)-trien-17-one
Catalogue No.:PA 05 46030
Molecular Formula : C18H22O2
Molecular Weight : 270.37
Estradiol
Catalogue No.:PA 05 46040
Molecular Formula : C18H24O2
Molecular Weight : 272.38
6α-Hydroxy-ethinylestradiol
Catalogue No.:PA 05 46050
Molecular Formula : C20H24O3
Molecular Weight : 312.40
6β-Hydroxy-ethinylestradiol
Catalogue No.:PA 05 46060
6-Oxo-ethinylestradiol
Catalogue No.:PA 05 46070
Molecular Formula : C20H22O3
Molecular Weight : 310.39
16-Oxo-ethinylestradiol
Catalogue No.:PA 05 46080
19-Nor-17α-pregna-1,3,5(10),6-tetraen-20-yne-3,17-diol
Catalogue No.:PA 05 46090
1-Methyl-ethinylestradiol
Catalogue No.:PA 05 46100
Molecular Formula : C21H26O2
Molecular Weight : 310.43
4-Methyl-ethinylestradiol
Catalogue No.:PA 05 46110
17α-Estradiol
Catalogue No.:PA 05 46120
2-Methyl-ethinylestradiol
Catalogue No.:PA 05 46130
Ethynyl Estradiol 3-Sulfate
Catalogue No.:PA 05 46510
Molecular Formula : C20H24O5S
Molecular Weight : 376.47
Ethinyl Estradiol Dimer Impurity 1
Catalogue No.:PA 05 46520
Molecular Formula : C40H46O4
Molecular Weight : 590.79
Ethinyl Estradiol Dimer Impurity 2
Catalogue No.:PA 05 46530
1-Methylestrone
Catalogue No.:PAI 05 005010
Molecular Formula : C19H24O2
Molecular Weight : 284.40
4-Bromoestrone
Catalogue No.:PAI 05 005020
Molecular Formula : C18H21BrO2
Molecular Weight : 349.27
4-Cyanoestrone
Catalogue No.:PAI 05 005030
Molecular Formula : C19H21NO2
Molecular Weight : 295.38
4-Formylestrone
Catalogue No.:PAI 05 005040
Molecular Formula : C19H22O3
Molecular Weight : 298.38
4-Methylestrone
Catalogue No.:PAI 05 005050
(8R,9S,13S,14S,17S)-1,13-dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PAI 05 005060
Molecular Formula : C24H34O2Si
Molecular Weight : 382.62
2-Hydroxy Ethinylestradiol
Catalogue No.:PA 05 46540
Molecular Weight : 312.41
(Z)-2-((3R,3aS,5aS,9aR,9bS,Z)-3-Ethynyl-3-hydroxy-3a-methyl-6-(2-oxoethylidene)dodecahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic Acid
Catalogue No.:PA 05 46550
Molecular Formula : C20H24O4
Molecular Weight : 328.41
(Z)-2-((3R,3aS,5aS,9aR,9bS)-3-Ethynyl-3-hydroxy-3a,6-dimethyldodecahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic Acid
Catalogue No.:PA 05 46560
Molecular Formula : C19H26O3
Molecular Weight : 302.41
(2Z,2'Z)-2,2'-((3R,3aS,5aS,9aR,9bS)-3-Ethynyl-3-hydroxy-3a-methyldecahydro-1H-cyclopenta[a]naphthalene-6,7-diylidene)diacetic acid
Catalogue No.:PA 05 46570
Molecular Formula : C20H24O5
Molecular Weight : 344.41
2-((3R,3aS,5aS,9aR,9bS,Z)-7-(Carboxymethylene)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic acid
Catalogue No.:PA 05 46580
Molecular Formula : C20H24O6
Molecular Weight : 360.41
2-((3R,3aS,5aS,9aR,9bS)-7-(Carboxy(hydroxy)methyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic Acid
Catalogue No.:PA 05 46590
Molecular Formula : C20H26O7
Molecular Weight : 378.42
(3R,3aS,5aS,9aR,9bS)-6-(Carboxycarbonyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydrospiro[cyclopenta[a]naphthalene-7,3'-[1,2]dioxetane]-4'-carboxylic Acid
Catalogue No.:PA 05 46600
Molecular Formula : C20H24O8
Molecular Weight : 392.4
2-((3R,3aS,5aS,9aR,9bS)-7-(Carboxy(hydroperoxy)methyl)-3-ethynyl-3-hydroxy-3a-methyldodecahydro-1H-cyclopenta[a]naphthalen-6-yl)-2-oxoacetic Acid
Catalogue No.:PA 05 46610
Molecular Formula : C20H26O8
Molecular Weight : 394.42
(Z)-2-((3R,3aS,9aS,9bS)-3-ethynyl-6-formyl-3-hydroxy-3a-methyl-1,2,3,3a,4,5,8,9,9a,9b-decahydro-7H-cyclopenta[a]naphthalen-7-ylidene)acetic acid
Catalogue No.:PA 05 46620
Molecular Formula : C19H22O4
Molecular Weight : 314.38
(8R,9S,14S,17S)-17-Ethynyl-17-hydroxy-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 05 46630
Molecular Formula : C19H22O2
Molecular Weight : 282.38
(8R,9S,13S,14S,17R)-17-Ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol
Catalogue No.:PA 05 46640
17β-Dihydro-17α-ethynyl-equillenin
Catalogue No.:PA 05 46650
Molecular Formula : C20H20O2
Molecular Weight : 292.38
Ethinylestradiol (E1900000)
Catalogue No.:PA EPE1900000
Molecular Formula : NA
Molecular Weight : NA
Catalogue No.:PA ICRS0305
Molecular Formula :
Catalogue No.:PA IPIPRS 86 10
Ethinylestradiol (JP 0078)
Catalogue No.:PA JP0078
Ethinylestradiol for system suitability (Y0001124)
Catalogue No.:PA EPY0001124
ethinylestradiol (421RB)
Catalogue No.:PA BP421RB
Catalogue No.:PAI 05 005070
Molecular Formula : C21H26O4
Molecular Weight : 342.44
Catalogue No.:PAI 05 005080
Molecular Formula : C21H28O3
Molecular Weight : 328.45
17β-Estradiol Diacetate
Catalogue No.:PAI 05 005090
Molecular Formula : C22H28O4
Molecular Weight : 356.46
Catalogue No.:PAI 05 005100
Molecular Formula : C23H28O5
Molecular Weight : 384.47
Catalogue No.:PAI 05 005110
Molecular Formula : C25H34O4
Molecular Weight : 398.54
Catalogue No.:PAI 05 005120
Molecular Formula : C26H34O5
Molecular Weight : 426.55
Catalogue No.:PAI 05 005130
Molecular Formula : C20H25BrO3
Molecular Weight : 393.32
2,2'-[[(17β)-Estra-1,3,5(10)-triene-3,17-diyl]bis(oxy)]bis[tetrahydro-2H-pyran
Catalogue No.:PAI 05 005140
Molecular Formula : C28H40O4
Molecular Weight : 440.62
4-Bromo 17β-Estradiol
Catalogue No.:PAI 05 005150
Molecular Formula : C18H23BrO2
Molecular Weight : 351.28
Catalogue No.:PAI 05 005160
Molecular Formula : C30H51BrO2Si2
Molecular Weight : 579.81
Catalogue No.:PAI 05 005170
Molecular Formula : C31H54O2Si2
Molecular Weight : 514.94
Catalogue No.:PAI 05 005180
Molecular Formula : C28H39BrO4
Molecular Weight : 519.52
Catalogue No.:PAI 05 005190
Molecular Formula : C29H42O4
Molecular Weight : 454.65
Catalogue No.:PAI 05 005200
Molecular Formula : C31H52O3Si2
Molecular Weight : 528.92
2,4,16α-Tribromo Estrone
Catalogue No.:PA 05 46660
Molecular Formula : C18H19Br3O2
Molecular Weight : 507.05
17-(2-Oxopropoxy)-7,8,9,11,12,13,14,15-octahydro-6H-cyclopenta[a]phenanthren-3-yl Acetate
Catalogue No.:PAI 05 005201
Molecular Formula : C22H26O4
Molecular Weight : 354.45
2,6b,7,8,8a,8b,9a,10,10a,10b-Decahydro-1H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4-yl Acetate
Catalogue No.:PAI 05 005202
1,2,6b,7,8,8a,9a,10,10a,10b-Decahydro-8bH-naphtho[2',1':4,5]indeno[1,2-b]oxirene-4,8b-diyl Diacetate
Catalogue No.:PAI 05 005203
Molecular Formula : C21H24O5
Molecular Weight : 356.42
3,16-Dihydroxy-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005204
Molecular Formula : C17H20O3
Molecular Weight : 272.34
(17S)-17-Ethynyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
Catalogue No.:PAI 05 005205
17α-Ethynyl-13C2-estradiol
Catalogue No.:PA STI 088481
Molecular Formula : C1813C2H24O2
Molecular Weight : 298.39
17α-Ethynylestradiol-16,16-d2 3-Methyl Ether
Catalogue No.:PA STI 088483
Molecular Formula : C21H24D2O2
Molecular Weight : 312.45
17α-Ethynylestradiol-2,4,16,16-d4 3-Methyl Ether
Catalogue No.:PA STI 088484
Molecular Formula : C21H22D4O2
Molecular Weight : 314.46
1-Hydroxy-4-methyl-17-ethynyl-3-dehydroxyestradiol
Catalogue No.:PA 05 0461000
Molecular Weight : 310.44
(8R,9S,13S,14S,17S)-17-Ethynyl-3,17-dihydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-6-one
Catalogue No.:PAI 05 005206
(8R,9S,13S,14S,17S)-17-Ethynyl-13-methyl-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl Diacetate
Catalogue No.:PAI 05 005207
Molecular Formula : C24H26O5
Molecular Weight : 394.47
(6S,8R,9S,13S,14S,17S)-17-Ethynyl-6-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diyl Diacetate
Catalogue No.:PAI 05 005208
Molecular Formula : C24H28O5
Molecular Weight : 396.48
17-Ethynylestriol
Catalogue No.:PA 05 0461001
2-tert-Butylestrone
Catalogue No.:PAI 05 005209
Molecular Formula : C22H30O2
Molecular Weight : 326.48
2-(1,1-Dimethylethyl)-3-hydroxy-17-oxoestra-1,3,5(10)-triene-4-carboxaldehyde
Catalogue No.:PAI 05 005210
Molecular Formula : C23H30O3
Molecular Weight : 354.49
(8R,9S,13S,14S)-3-Methoxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005211
Molecular Formula : C20H26O2
Molecular Weight : 298.43
(8R,9S,13S,14S)-3,4,13-Trimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005212
Molecular Formula : C20H26O
Molecular Weight : 282.43
(13S,17R)-17-ethynyl-3-hydroxy-13-methyl-6-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl acetate
Catalogue No.:PAI 05 005213
Molecular Formula : C22H24O4
Molecular Weight : 352.43
3-O-Methyl 6-Hydroxy 17β-Estradiol
Catalogue No.:PA 05 0461002
(8R,9S,13S,14S)-3-((Tert-butyldimethylsilyl)oxy)-1,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005214
Molecular Formula : C25H38O2Si
Molecular Weight : 398.66
(8R,9S,13S,14S)-4-Bromo-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 005215
Molecular Formula : C20H23BrO3
Molecular Weight : 391.31
(8R,9S,13S,14S)-4,13-Dimethyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl acetate
Catalogue No.:PAI 05 005216
Molecular Formula : C21H26O3
Molecular Weight : 326.44
(8R,9S,13S,14S)-3-Hydroxy-4,13-dimethyl-6,7,8,9,11,12,13,14,15,16-decahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PAI 05 005217
Molecular Weight : 284.4
(8S,9S,10S,11S,13S,14S)-17-Acetyl-11-hydroxy-10,13-dimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15-decahydro-3H-cyclopenta[a]phenanthren-2-yl acetate
Catalogue No.:PA 05 0461004
(8R,9S,13S,14S,17R)-1,13-Dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PAI 05 005218
(8R,9S,13S,14S,17S)-17-Ethynyl-2,13-dimethyl-8,9,12,13,14,15,16,17-octahydro-11H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 05 0461005
Molecular Formula : C21H24O2
Molecular Weight : 308.42
(8R,9S,13S,14S,17R)-4,13-Dimethyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol;
Catalogue No.:PAI 05 005219
(8S,13S,14S,17R)-17-ethynyl-9-hydroperoxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 05 0461006
Estradiol Dimer Impurity
Catalogue No.:PA 05 0461007
Molecular Formula : C72H92O8
Molecular Weight : 1085.52
(6S,8R,9S,13S,14S,17S)-17-Ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,6,17-triol
Catalogue No.:PA 05 0461008
(8R,9S,13S,14S,17R)-2-((Dimethylamino)methyl)-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PAI 05 005220
Molecular Formula : C23H31NO2
Molecular Weight : 353.51
(8R,9S,13S,14S,16R,17S)-13-Methyl-17-((trimethylsilyl)ethynyl)-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16,17-triol
Catalogue No.:PAI 05 005221
Molecular Formula : C23H32O3Si
Molecular Weight : 384.59
[2,2'-Bi-19-norpregna-1,3,5(10)-trien-20-yne]-3,3',17,17'-tetrol, (17a)-(17'a)
Catalogue No.:PA 05 0461009
Molecular Weight : 590.8
[2,4'-Bi-19-norpregna-1,3,5(10)-trien-20-yne]-3,3',17,17'-tetrol, (17a)-(17'a)
Catalogue No.:PA 05 0461010
Ethinylestradiol (IPRS/37/17)
Catalogue No.:PA IPRS 37 17
19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, 3-acetate
Catalogue No.:PAI 05 005224
Molecular Formula : C22H26O3
Molecular Weight : 338.45
(6bS,8aS,8bS,9aR,10aS,10bR)-8b-Ethynyl-8a-methyl-2,6b,7,8,8a,8b,9a,10,10a,10b-decahydro-1H-naphtho[2',1':4,5]indeno[1,2-b]oxiren-4-yl acetate
Catalogue No.:PAI 05 005223
Molecular Formula : C22H24O3
Molecular Weight : 336.43
19-Norpregna-1,3,5(10),16-tetraen-20-yn-3-ol, Acetate
Catalogue No.:PAI 05 005222
Molecular Formula : C22H24O2
Molecular Weight : 320.43
(8R,9S,13S,14S,17R)-3-Acetoxy-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl 4-nitrobenzoate
Catalogue No.:PAI 05 005225
Molecular Formula : C29H29NO6
Molecular Weight : 487.55
Delta-8(9)-Ethinyl Estradiol
Catalogue No.:PA 05 0461011
(8R,9S,13S,14S,17S)-3-Acetoxy-17-ethynyl-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-17-yl 4-nitrobenzoate
Catalogue No.:PAI 05 005226
16α,17α-Epoxyestra-1,3,5(10)-triene-3,17β-diol diacetate
Catalogue No.:PAI 05 005227
Molecular Formula : C22H26O5
Molecular Weight : 370.45
16α-Hydroxyestrone diacetate
Catalogue No.:PAI 05 005228
(8R,9S,13S,14S,16R,17R)-17-Ethynyl-17-hydroxy-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene-3,16-diyl Diacetate
Catalogue No.:PAI 05 005229
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