1. APIs
  2. Estradiol
  3. Impurities

Estradiol Impurities

Name Structure CASRN Other Names and Identifiers
Estra-1,3,5(10),9(11)-tetraene-3,17β-diol structure 791-69-5
  • BP Estradiol Hemihydrate Impurity D
4-Methylestra-1,3,5(10)-triene-3,17β-diol structure
  • BP Estradiol Hemihydrate Impurity C
6-Dehydroestradiol structure 7291-41-0
  • BP Estradiol Vaginal Tablets Impurity 3
  • Δ6-Estradiol
6-Ketoestradiol structure 571-92-6
  • BP Estradiol Vaginal Tablets Impurity 2
  • 3,17β-dihydroxyestra-1,3,5(10)-trien-6-one
6β-Hydroxyestradiol structure 547-81-9
6α-Hydroxyestradiol structure 1229-24-9
  • BP Estradiol Vaginal Tablets Impurity 1
  • estra-1,3,5(10)-triene-3,6α,17β-triol
E2 Impurity 02 structure
E2 Impurity 01 structure
E2 Impurity 06 structure
E2 Impurity 05 structure
E2 Impurity 04 structure
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
17α-Estradiol structure 57-91-0
  • BP Estradiol Hemihydrate Impurity B
  • BP Ethinylestradiol Impurity L