aaa (20R,24R)-24-Methylcholestane CAS 50897-35-3

Purity 97%+In StockPharmaceutical Standards
CAS No.50897-35-3
Molecular FormulaC28H50
Molecular Weight386.70 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

aaa (20R,24R)-24-Methylcholestane CAS 50897-35-3 chemical structure

Description

As a certified reference material (CRM), aaa (20R,24R)-24-Methylcholestane meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

CATO supplies aaa (20R,24R)-24-Methylcholestane (CAS 50897-35-3), a certified reference material (molecular formula C28H50, MW 386.70 g/mol) for analytical method development and quality control.

The molecular framework of aaa (20R,24R)-24-Methylcholestane (C28H50) is characterized by an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

Physical & Chemical Properties

Molecular FormulaC28H50
Molecular Weight386.70 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1971

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