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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


API Standards

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


Metabolites

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


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(13S,14S,17R)-Ethinyl Estradiol Impurities CS-P-07878 1357266-17-1 Enquire
1-Methyl Ethynyl Estradiol Impurities CS-T-58205 15071-66-6 Enquire
4-Methyl Ethynyl Estradiol Impurities CS-T-58206 155683-61-7 Enquire
Ethinyl Estradiol Dimer Impurity 1 Impurities CS-F-00117 303014-90-6 Enquire
Ethinyl Estradiol Dimer Impurity 2 Impurities CS-F-00118 303014-91-7 In Stock
Ethinyl estradiol EP Impurity C Impurities CS-DN-00006 Not Available Enquire
Ethinyl estradiol EP Impurity D Impurities CS-DN-00007 Not Available Enquire
Ethinyl Estradiol EP Impurity I Impurities CS-T-51760 67703-68-8 In Stock
Ethinyl Estradiol Related Compound B Impurities CS-K-00047 1231-96-5 In Stock


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
6-β-Hydroxy Ethynyl Estradiol Intermediates CS-T-56011 56324-28-8 Enquire