Description

Ethynylestradiol 17-Acetate is a synthetic estrogen derivative, specifically the 17-acetate ester of ethynylestradiol, known for its high biological activity and stability. This compound is a critical pharmaceutical intermediate, valued for its role in the synthesis of advanced steroidal drugs and active pharmaceutical ingredients (APIs). It is primarily required by manufacturers in the pharmaceutical and life sciences sectors for research, development, and production of hormone-based therapies and diagnostic agents.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of steroidal drugs and hormonal contraceptives.
• Active Pharmaceutical Ingredient (API) Production: Used in the manufacture of final drug formulations requiring estrogenic activity.
• Biochemical Research: Serves as a reference standard and reagent in endocrinology and hormone receptor studies.
• Veterinary Medicine: Employed in the development of hormonal treatments for animals.
• Academic & Industrial R&D: Utilized in laboratories for exploring new therapeutic applications and metabolic pathways.

Basic Information

Product Name	Ethynylestradiol 17-Acetate
CAS No.	21221-29-4
Molecular Formula	C22H28O3
Molecular Weight	340.46 g/mol
Synonyms	17α-Ethynylestradiol 3-acetate; 19-Nor-17α-pregna-1,3,5(10)-trien-20-yne-3,17-diol 3-acetate; EE2 Acetate; Ethinylestradiol Acetate; Ethynylestradiol acetate; 17α-Ethynyl-1,3,5(10)-estratriene-3,17β-diol 3-acetate
EINECS	Contact for details

Quality Control

Our Ethynylestradiol 17-Acetate is produced and tested under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency, meeting the stringent requirements for pharmaceutical intermediates. A Certificate of Analysis (COA) detailing specifications and test results is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (typically 15-25°C). This product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed in a low-humidity environment to prevent degradation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥98.0%
Loss on Drying	≤1.0%
Related Substances (HPLC)	Total impurities ≤2.0%
Single Unknown Impurity	≤0.5%

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