Description

17-Ethylestradiol is a synthetic estrogen derivative, a potent and highly specific active pharmaceutical ingredient (API) used in hormone therapy and pharmaceutical formulations. Its primary value lies in its well-characterized biological activity and its role as a key component in various steroidal medications. This compound is essential for manufacturers in the pharmaceutical industry, particularly for producing hormonal contraceptives and treatments for menopausal symptoms and certain hormone-sensitive conditions.

Application

• Active Pharmaceutical Ingredient (API) in oral contraceptive pills and hormone replacement therapy (HRT) medications.
• Key intermediate in the synthesis of more complex steroidal drugs and hormone analogs.
• Research and development of new endocrine therapies and drug delivery systems.
• Reference standard for analytical testing and quality control in pharmaceutical laboratories.
• Component in veterinary pharmaceuticals for reproductive health management.

Basic Information

Product Name	17-Ethylestradiol
CAS No.	2553-34-6
Molecular Formula	C20H26O2
Molecular Weight	298.42 g/mol
Synonyms	Ethinylestradiol; EE2; 19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol; 17α-Ethynylestradiol; 17α-Ethynyl-1,3,5(10)-estratriene-3,17β-diol; Lynoral; Estinyl
EINECS	219-861-3

Quality Control

Our 17-Ethylestradiol is manufactured under strict quality management systems to ensure it meets the stringent requirements for pharmaceutical actives. Each batch is subjected to comprehensive analytical testing, including identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results against relevant pharmacopeial standards (such as USP/EP) is provided with every shipment to guarantee traceability, consistency, and regulatory compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed in original packaging and protected from humidity and light exposure to maintain stability and potency.

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 ≤ 0.5%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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