Description

3-Ethoxyandrosta-3,5,9(11)-Trien-17-One is a high-purity steroidal intermediate of significant interest in advanced pharmaceutical synthesis. This compound serves as a critical building block for the development of novel therapeutic agents, particularly in the fields of endocrinology and oncology. It is essential for research institutions and pharmaceutical manufacturers engaged in the synthesis of complex steroid derivatives and active pharmaceutical ingredients (APIs).

Application

• Pharmaceutical Intermediate: A key precursor in the multi-step synthesis of specialized steroid-based active pharmaceutical ingredients (APIs).
• Research & Development: Used in medicinal chemistry for the discovery and development of new therapeutic compounds targeting hormone-related pathways.
• Reference Standard: Serves as a high-purity analytical standard for quality control and method validation in pharmaceutical laboratories.
• Process Chemistry: Employed in scale-up and optimization studies for the commercial production of steroidal drugs.
• Biochemical Research: Utilized in studies investigating steroid receptor interactions and metabolic pathways.

Basic Information

Product Name	3-Ethoxyandrosta-3,5,9(11)-Trien-17-One
CAS No.	72659-99-5
Molecular Formula	C21H28O2
Molecular Weight	312.45 g/mol
Synonyms	3-Ethoxyestra-3,5,9(11)-trien-17-one; 3-Ethoxy-9(11)-dehydroestrone methyl ether; 17-Oxo-3-ethoxyandrosta-3,5,9(11)-triene; 3-Ethoxy-δ9(11)-estratrien-17-one; 3-Ethoxyestra-3,5,9(11)-trien-17-one; 3-Ethoxy-19-norandrosta-3,5,9(11)-trien-17-one
EINECS	Contact for details

Quality Control

Our 3-Ethoxyandrosta-3,5,9(11)-Trien-17-One is manufactured under strict quality management systems. Each batch is subjected to comprehensive analytical testing, including HPLC, NMR, and mass spectrometry, to ensure identity, purity, and consistency. We provide full traceability and a detailed Certificate of Analysis (COA) with every shipment, confirming compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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