Description

Estren (CAS NO 35950-87-9) is a synthetic steroid derivative with significant research and development applications in the life sciences. This compound is valued for its role as a key intermediate and reference standard in the synthesis of more complex steroid-based molecules. It is primarily utilized by pharmaceutical R&D laboratories, academic research institutions, and specialty chemical manufacturers. Its controlled structure makes it essential for studies in endocrinology and for developing novel therapeutic agents.

Application

• Pharmaceutical Intermediate: Serves as a crucial building block in the multi-step synthesis of advanced steroid pharmaceuticals and active pharmaceutical ingredients (APIs).
• Biochemical Research: Used as a reference standard and a tool compound in academic and industrial research focused on steroid hormone pathways and receptor interactions.
• Reference Material: Employed in analytical laboratories for method development, calibration, and quality control testing of related steroid compounds.
• Life Science Product Development: Acts as a precursor in the development of diagnostic reagents, assay kits, and other research-grade biochemicals.

Basic Information

Product Name	Estren
CAS No.	35950-87-9
Molecular Formula	C19H26O
Molecular Weight	270.41 g/mol
Synonyms	19-Nor-17α-pregna-1,3,5(10)-trien-20-yn-17-ol; 17α-Ethynyl-19-norandrosta-1,3,5(10)-trien-17β-ol; 17α-Ethynylestra-1,3,5(10)-trien-17β-ol; 19-Norpregna-1,3,5(10)-trien-20-yn-17-ol; Estren (pharmaceutical intermediate); 35950-87-9; 17α-Ethynyl-19-norandrosta-1,3,5(10)-trien-17-ol
EINECS	Contact for details

Quality Control

Our Estren is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets the high standards required for research and synthesis. A detailed Certificate of Analysis (COA) is provided with every shipment, documenting all critical quality parameters.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single impurity ≤ 1.0%
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.