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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Ethynylestradiol, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Ethynylestradiol 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 Ethynylestradiol-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.

Ethynylestradiol Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
17α-Ethynylestradiol-16,16-d2 3-Methyl Ether Stable Isotopes CS-C-01053 72-33-3 (Unlabelled) Enquire
17α-Ethynylestradiol-2,4,16,16-d4 3-Methyl Ether Stable Isotopes CS-C-01068 72-33-3 (Unlabelled) Enquire
Ethynylestradiol-16,16-d2 ethynyl-13C2 Stable Isotopes CS-O-52760 57-63-6 (Unlabelled) Enquire
17α-Ethynylestradiol 13C3 Stable Isotopes CS-EK-01486 57-63-6 unlabeled Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethynylestradiol Impurity M Impurity CS-P-07805 1818-11-7 Enquire


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethynylestradiol-β-D-Glucuronide Glucuronide CS-T-54226 60134-76-1 Enquire


Steroids

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
delta-8(9)-Ethynylestradiol Steroids CS-O-43430 100019-04-3 Enquire
(±)-6-Hydroxy-ethynylestradiol Steroids CS-O-43530 108646-70-4 Enquire
16b-Hydroxy-17a-ethynylestradiol Steroids CS-O-43610 10084-25-0 Enquire