Description

Rapisterone C CAS NO 19974-41-5 is a high-purity steroidal compound of significant interest in advanced pharmaceutical research and development. This compound serves as a critical intermediate or reference standard for the synthesis and analysis of novel therapeutic agents. It is primarily utilized by research institutions, pharmaceutical manufacturers, and biotechnology companies engaged in drug discovery and process development. Our supply is characterized by stringent quality control, ensuring reliability for sensitive applications.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of novel steroidal drugs and active pharmaceutical ingredients (APIs).
• Reference Standard: Used in analytical laboratories for method development, validation, and quality control testing via HPLC, LC-MS, or GC-MS.
• Biochemical Research: Employed in academic and industrial research to study steroid hormone pathways, receptor binding, and metabolic processes.
• Process Development: Serves as a critical material in scaling up and optimizing synthetic routes for new chemical entities.
• Impurity Standard: Utilized to identify, quantify, and control related substances in final drug substance batches.

Basic Information

Product Name	Rapisterone C
CAS No.	19974-41-5
Molecular Formula	C21H28O5
Molecular Weight	360.45 g/mol
Synonyms	Rapisterone C; 11β,21-Dihydroxy-3,20-dioxopregn-4-en-18-al; 11β,21-Dihydroxypregn-4-ene-3,18,20-trione; Pregn-4-ene-3,18,20-trione, 11,21-dihydroxy-, (11β)-; 19974-41-5; NSC 83688
EINECS	Contact for details

Quality Control

Every batch of Rapisterone C is manufactured and tested under a strict quality management system. We provide comprehensive analytical data to ensure the material meets the high-purity requirements for research and pharmaceutical applications. A detailed Certificate of Analysis (COA) is supplied with each shipment, documenting identity, purity, and impurity profiles. Our quality protocols are designed to support compliance with cGMP and ICH guidelines where applicable.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider desiccated conditions.

Specification

Item	Specification
Appearance	White to off-white 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 unknown impurity ≤ 0.5%
Loss on Drying	≤ 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.