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

Ethynyl Estradiol Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Methyl-d3 Ethynyl Estradiol Stable Isotopes CS-T-99478 Not Available Enquire
Ethynyl Estradiol 3-Sulfate Sodium Salt-d4 (Major) Stable Isotopes CS-T-102804 724762-79-2 (Unlabelled) Enquire
Ethynyl Estradiol-d7 Stable Isotopes CS-T-99576 Not Available Enquire
Ethynyl Estradiol-13C2 Stable Isotopes CS-O-42582 2483735-63-1 Enquire
Ethynyl Estradiol-2,4,9,6,6,16,16- D7 Stable Isotopes CS-O-14062 57-63-6(Unlabeled) Enquire
Ethynyl Estradiol-2,4,9,6,6,16,16-d7 (Major) Stable Isotopes CS-T-95469 Not Available Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
17-alpha-Ethynyl Estradiol-3-Sulfate Metabolite CS-P-07803 24560-70-1 Enquire
Ethynyl Estradiol Sulfate Metabolite CS-O-01448 724762-79-2 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
16-Oxo Ethynyl Estradiol Impurity CS-T-60074 1350468-76-6 Enquire
17-alpha-Ethynyl Estradiol-3-Sulfate Triethylamine Salt Impurity CS-P-09239 24560-70-1 (free acid) Enquire
1-Methyl Ethynyl Estradiol Impurity CS-T-58205 15071-66-6 Enquire
2-Methyl Ethynyl Estradiol Impurity CS-T-58208 3240-39-9 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
9,11-Dehydro Ethynyl Estradiol Impurity CS-O-05547 1231-96-5 In Stock
17-alpha-Ethynyl Estradiol-3, 17-Disulfate Impurity CS-P-08927 75803-37-1 Enquire
Ethynyl Estradiol 17-Acetate Impurity CS-T-54229 21221-29-4 Enquire
Ethynyl Estradiol Diacetate Impurity CS-T-54231 13258-68-9 Enquire


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethynyl Estradiol 17-β-D-Glucuronide Glucuronide CS-T-54227 75803-39-3 Enquire
Ethynyl Estradiol 17-Acetate-β-(2',3',4'-Tri-O-acetyl)-... Glucuronide CS-T-54230 242130-33-2 Enquire


Steroids

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
6a-Hydroxy-18-methylethynyl estradiol Steroids CS-O-43450 1175112-25-0 Enquire
6beta-Hydroxy-18-methylethynyl estradiol Steroids CS-O-43451 1175113-26-4 Enquire
6-Keto ethynyl estradiol-3-valerate Steroids CS-O-43598 1350468-80-2 Enquire
6-Keto-18-methyl-17-ethynyl estradiol Steroids CS-O-43449 38165-80-9 Enquire
delta-6(7)-18-Methylethynyl estradiol Steroids CS-O-43452 1175128-91-2 Enquire