Description

Fosfestrol CAS NO 522-40-7 is a synthetic, non-steroidal estrogen derivative with specific therapeutic applications. This compound is valued for its targeted activity in hormone-sensitive conditions, offering a distinct chemical profile for advanced pharmaceutical development. It is primarily utilized by research institutions and pharmaceutical manufacturers engaged in the development of specialized oncological and endocrine therapies.

Application

• Pharmaceutical Intermediate: Serves as a key synthetic precursor in the manufacture of specialized hormonal therapies.
• Biochemical Research: Used as a reference standard and active agent in studies of estrogen receptor (ER) signaling pathways and mechanisms.
• Oncological R&D: Investigated for its potential applications in hormone-sensitive cancer research models.
• Endocrine Disorder Studies: Employed in laboratory research focused on understanding and modulating endocrine system functions.

Basic Information

Product Name	Fosfestrol
CAS No.	522-40-7
Molecular Formula	C18H22O8P2
Molecular Weight	452.30 g/mol
Synonyms	Fosfestrol; Diethylstilbestrol Diphosphate; Honvan; Stilphostrol; ST-52; NSC-10481; Fosfestrolum; 4,4'-(1,2-Diethyl-1,2-ethenediyl)bis[phenol] bis(dihydrogen phosphate)
EINECS	208-325-7

Quality Control

Our Fosfestrol is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including identification, assay, and impurity profiling via validated methods such as HPLC and IR spectroscopy. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory documentation needs.

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 (moisture-sensitive) nature, the container must be 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%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%

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