Description

Ethinylestradiol is a potent synthetic estrogen derivative widely used in pharmaceutical manufacturing. Its high biological activity and stability make it a critical active pharmaceutical ingredient (API) for hormonal therapies. This compound is essential for producers of oral contraceptives, hormone replacement therapies, and other endocrine disorder treatments, requiring consistent high purity and reliable supply chains.

Application

• Pharmaceutical API: Primary active ingredient in combined oral contraceptive pills.
• Hormone Replacement Therapy (HRT): Used in formulations to manage menopausal symptoms and estrogen deficiency.
• Veterinary Pharmaceuticals: Employed in estrus synchronization and fertility treatments for livestock.
• Clinical Research: Serves as a reference standard and key component in endocrine and reproductive biology studies.
• Dermatological Preparations: Incorporated into topical treatments for certain skin conditions influenced by hormonal factors.

Basic Information

Product Name	Ethinylestradiol
CAS No.	100019-04-3
Molecular Formula	C20H24O2
Molecular Weight	296.40 g/mol
Synonyms	Ethinyl Estradiol; 17α-Ethynylestradiol; EE2; 19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol; Lynoral; Estinyl; 17α-Ethynyl-1,3,5(10)-estratriene-3,17β-diol
EINECS	Contact for details

Quality Control

Our Ethinylestradiol is manufactured under strict quality management systems, targeting compliance with major pharmacopoeial standards such as USP and EP. Each batch undergoes comprehensive analytical testing including identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided to ensure full traceability and quality assurance for our B2B partners.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	White or almost white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 1.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Specific Optical Rotation	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.