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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Ethinyl, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Ethinyl 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-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 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 -D4 Stable Isotopes CS-O-35319 57-63-6(Unlabeled) Enquire
Ethinylestradiol sulfate-D4 Stable Isotopes CS-BU-00042 Not Available Enquire
Ethinylestradiol-d7 Stable Isotopes CS-EO-02527 Not Available Enquire


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
"Ethynodiol Impurity (17-alfa-Ethinyl-17-beta-Acettoxy-3,5-E... Impurities CS-P-07801 64850-62-0 Enquire
(13S,14S,17R)-Ethinyl Estradiol Impurities CS-P-07878 1357266-17-1 Enquire
3-ethoxy-17-hydroxy-11-methylen-17α-trimethylsilylethinyl-13... Impurities CS-O-43078 Not Available 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


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethinylestradiol (E1900000) EP Standards CS-EG-00623 57-63-6 Enquire
Ethinylestradiol for system suitability (Y0001124) EP Standards CS-EG-02836 57-63-6 Enquire