1. APIs
  2. Ethinyl Estradiol
  3. Impurities

Ethinyl Estradiol Impurities

Name Structure CASRN Other Names and Identifiers
Ethinyl Estradiol Dimer 5 structure
Ethinyl Estradiol Dimer 4 structure
Ethinyl Estradiol Dimer 3 structure
Ethinyl Estradiol Dimer 2 structure
Ethinyl Estradiol Dimer 1 structure
9-Hydroperoxyethinyl Estradiol structure
17β-Ethinyl Estradiol structure 4717-38-8
  • BP Ethinylestradiol Impurity A
  • 19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol
  • 17-Epi-Ethinyl Estradiol
9(11)-Dehydroethinyl Estradiol structure 1231-96-5
  • BP Ethinylestradiol Impurity B
  • 19-nor-17α-pregna-1,3,5(10),9(11)-tetraen-20-yne-3,17-diol
  • 9(11)-dehydroethynyloestradiol
Estrone structure 53-16-7
  • BP Ethinylestradiol Impurity C
  • BP Estradiol Hemihydrate Impurity A
  • BP Estradiol and Norethisterone Tablets Impurity A
  • BP Estradiol and Norethisterone Acetate Tablets Impurity A
  • Folliculin
  • Oestrone
  • Theelin
  • Estrovarin
Estradiol structure 50-28-2
  • BP Estradiol Cypionate Impurity A
  • BP Estradiol Valerate Impurity A
  • BP Ethinylestradiol Impurity D
  • 17β-Estradiol
  • Oestradiol
  • Dihydrofolliculin
  • Estrace
6α-Hydroxyethinyl Estradiol structure 27521-34-2
  • BP Ethinylestradiol Impurity E
  • 6α-hydroxy-ethinylestradiol
  • 19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,6&alpha,17-triol
6β-Hydroxyethinyl Estradiol structure 56324-28-8
  • BP Ethinylestradiol Impurity F
  • 19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,6β,17α-triol
  • norpregna-1,3,5(10)-trien-20-yne-3,6,17-triol
  • 19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,6β,17-triol
6-Ketoethinyl Estradiol structure 38002-18-5
  • BP Ethinylestradiol Impurity G
  • 6-oxo-ethiynlestradiol
  • 3,17-dihydroxy-19-nor-17α-pregna-1,3,5(10)-trien-20-yn-6-one
  • 17α-ethynyl-3,17β-dihydroxyestra-1,3,5(10)-trien-6-one
16-Oxo-ethinylestradiol structure 1350468-76-6
  • BP Ethinylestradiol Impurity H
  • 3,17-dihydroxy-19-nor-17α-pregna-1,3,5(10)-trien-20-yn-16-one
  • (8R,9S,13S,14S,17R)-17-ethynyl-13-methyl-3,17-bis(oxidanyl)-6,7,8,9,11,12,14,15-octahydrocyclopenta[a]phenanthren-16-one
1-Methyl-ethinylestradiol structure 15071-66-6
  • BP Ethinylestradiol Impurity J
  • 1-methyl-19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol
4-Methyl-ethinylestradiol structure 155683-61-7
  • BP Ethinylestradiol Impurity K
  • 4-methyl-19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol
17α-Estradiol structure 57-91-0
  • BP Estradiol Hemihydrate Impurity B
  • BP Ethinylestradiol Impurity L
2-Methyl-ethinylestradiol structure 3240-39-9
  • BP Ethinylestradiol Impurity M
  • 2-methyl-19-nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol
19-Nor-17α-pregn-1,3,5(10),6-tetraen-20-yne-3,17-diol structure 67703-68-8
  • BP Ethinylestradiol Impurity I
  • 6,7-dehydro ethynyl estradiol
  • Δ6-ethinyl estradiol
  • 3,17β-dihydroxy-19-norpregna-1,3,5(10),6-tetraene-20-yne
  • Δ6-dehydroethynylestradiol