Description

Alpha, Alpha, Alpha 20S-Cholestane is a high-purity sterane derivative, a saturated hydrocarbon belonging to the cholestane family. This compound serves as a critical reference standard and analytical marker in geochemical and biochemical research, providing essential structural and diagnostic information. It is primarily utilized by research institutions, analytical laboratories, and petrochemical companies for biomarker studies and method validation.

Application

• Geochemical Biomarker Analysis: Used as a key internal standard and reference compound in gas chromatography-mass spectrometry (GC-MS) for studying petroleum, sediments, and ancient rocks.
• Steroid and Sterol Research: Acts as a stable structural analog in biochemical studies of cholesterol metabolism and steroid hormone pathways.
• Pharmaceutical Reference Standard: Serves as a high-purity chemical standard for quality control and method development in pharmaceutical R&D.
• Environmental Forensics: Employed as a diagnostic tracer in environmental studies to identify sources of organic pollution.
• Organic Synthesis Intermediate: Provides a saturated sterane backbone for the synthesis of more complex steroid-like molecules.
• Academic Research & Teaching: Used in university laboratories for advanced organic chemistry and geochemistry education.

Basic Information

Product Name	Alpha, Alpha, Alpha 20S-Cholestane
CAS No.	41083-75-4
Molecular Formula	C₂₇H₄₈
Molecular Weight	372.67 g/mol
Synonyms	20S-Cholestane; 5α-Cholestane; Cholestane; Allocholestane; 5α,14α,17α-Cholestane; 5α,14α,17α-20S-Cholestane; (20S)-5α-Cholestane; NSC 92538
EINECS	Contact for details

Quality Control

Our Alpha, Alpha, Alpha 20S-Cholestane is manufactured under strict quality protocols. Each batch undergoes comprehensive analytical testing, including HPLC, GC-MS, and NMR, to ensure high chemical purity and structural identity. Certificates of Analysis (COA) with detailed chromatographic data are provided to guarantee traceability and consistency, meeting the stringent requirements of research and analytical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). The product is stable under these conditions for extended periods.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Identification (GC-MS)	Conforms to reference
Assay (HPLC)	≥ 98.0%
Melting Point	79 - 82 °C
Specific Rotation	Contact for details
Heavy Metals	< 10 ppm
Residue on Ignition	< 0.1%

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