1. APIs
  2. Ethinyl Estradiol
  3. Impurities
  4. 17β-Ethinyl Estradiol

17β-Ethinyl Estradiol

Structure

MOL SDF CML

Other Names & Identifiers

  • BP Ethinylestradiol Impurity A
  • 19-norpregna-1,3,5(10)-trien-20-yne-3,17-diol
  • 17-Epi-Ethinyl Estradiol

CASRN

4717-38-8

Molecular Formula

C20H24O2

References

Molecular Weight

296.4 g/mol

References

Strutural Difference from API

Stereochemical inversion at C17

References

Source from API

synthetic impurity

library_books

References

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

Melting Point

210-212° C

library_books

References

  1. Online Subscription Database. Reed Elsevier Properties SA. (View all citations for this reference)

Reaxys ID #

7177007

library_books

References

  1. Online Subscription Database. Reed Elsevier Properties SA. (View all citations for this reference)

Limits

0.1%