Description

3,20-Dioxopregn-4-En-21-Yl 4-Bromobenzenesulfonate is a high-purity steroid derivative and a key synthetic intermediate in advanced pharmaceutical research. This compound matters for its role in the development of novel therapeutic agents, particularly in the fields of endocrinology and oncology. It is primarily needed by research institutions, pharmaceutical R&D laboratories, and fine chemical manufacturers engaged in the synthesis of complex bioactive molecules and reference standards.

Application

• Pharmaceutical Intermediate: A crucial building block in the multi-step synthesis of specialized steroid-based active pharmaceutical ingredients (APIs).
• Biochemical Research: Used as a reference standard or precursor in metabolic pathway studies and hormone receptor research.
• Process Development: Serves as a model compound for developing and optimizing new synthetic routes and purification methodologies in fine chemistry.
• Academic Research: Employed in university and institutional labs for investigating steroid chemistry and creating novel molecular libraries.
• Custom Synthesis: A starting material for the contract manufacturing of bespoke steroid derivatives for client-specific applications.

Basic Information

Product Name	3,20-Dioxopregn-4-En-21-Yl 4-Bromobenzenesulfonate
CAS No.	21170-34-3
Molecular Formula	C28H33BrO5S
Molecular Weight	561.53 g/mol
Synonyms	21-(4-Bromobenzenesulfonyloxy)-3,20-dioxopregn-4-ene; 4-Bromobenzenesulfonic Acid 3,20-Dioxopregn-4-En-21-Yl Ester; Pregn-4-ene-3,20-dione, 21-[(4-bromophenyl)sulfonyl]oxy]-; 21-Hydroxypregn-4-ene-3,20-dione 4-bromobenzenesulfonate; 4-Bromophenyl Sulfonate Ester of 21-Hydroxypregnenolone; 21-Tosylate Derivative of Pregnenedione (4-Bromo analogue)
EINECS	Contact for details

Quality Control

Our 3,20-Dioxopregn-4-En-21-Yl 4-Bromobenzenesulfonate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets the high standards required for research and development. Certificates of Analysis (COA) detailing batch-specific results are available upon request to support your quality assurance protocols.

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 dry environment to prevent degradation. For long-term storage, consider the use of desiccants.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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