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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Ethinyl Estradiol, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Ethinyl Estradiol impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Ethinyl Estradiol-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Ethinyl Estradiol Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
17-Alpha-Ethinyl Estradiol-d4 Stable Isotopes CS-O-02753 350820-06-3 In Stock
Ethinylestradiol-d7 Stable Isotopes CS-EO-02527 Not Available Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethinyl Estradiol API CS-O-01450 57-63-6 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethinyl Estradiol sodium Sulfate Metabolite CS-O-06043 Not Available Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
16-Oxo Ethynyl Estradiol Impurity CS-T-60074 1350468-76-6 Enquire
1-Methyl Ethynyl Estradiol Impurity CS-T-58205 15071-66-6 Enquire
4-Methyl Ethynyl Estradiol Impurity CS-T-58206 155683-61-7 Enquire
6-Keto Ethynyl Estradiol Impurity CS-T-57001 38002-18-5 In Stock
6-α-Hydroxy Ethynyl Estradiol Impurity CS-T-56010 27521-34-2 In Stock
Ethinyl Estradiol EP Impurity I Impurity CS-T-51760 67703-68-8 In Stock
Ethinyl Estradiol Related Compound B Impurity CS-K-00047 1231-96-5 In Stock
(13S,14S,17R)-Ethinyl Estradiol Impurity CS-P-07878 1357266-17-1 Enquire
a-Ethynodiol diacetate Impurity CS-EO-00624 61217-13-8 Enquire
Ethinyl Estradiol Dimer Impurity 1 Impurity CS-F-00117 303014-90-6 Enquire
Ethinyl Estradiol Dimer Impurity 2 Impurity CS-F-00118 303014-91-7 In Stock
Ethinyl estradiol EP Impurity C Impurity CS-DN-00006 Not Available Enquire
Ethinyl estradiol EP Impurity D Impurity CS-DN-00007 Not Available Enquire
Ethinylestradiol Dimer Impurity CS-EO-00875 Not Available Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethinyl Estradiol Secondary Standards CS-SS-24463-200MG 57-63-6 Enquire