Estradiol

Structure

Other Names & Identifiers

  • BP Estradiol Cypionate Impurity A
  • BP Estradiol Valerate Impurity A
  • BP Ethinylestradiol Impurity D
  • 17β-Estradiol
  • Oestradiol
  • Dihydrofolliculin
  • Estrace

CASRN

50-28-2

Notes

Impurity in ethinyl estradiol, estradiol valerate, and estradiol cypionate.

Structural Difference from API

The ethinyl group of EE is replaced with a H group.

library_books

References

  1. British Pharmacopoeia 2017: Ethinylestradiol monograph
  2. (View all citations for this reference)

Source from API

Synthetic impurity; loss of ethinyl group;

library_books

References

  1. British Pharmacopoeia 2017: Ethinylestradiol monograph
  2. (View all citations for this reference)

Limits

0.10%, 0.2% (E2V)