aaa (20R,24S)-24-Methylcholestane CAS 511-20-6

Purity 97%+In StockPharmaceutical Standards
CAS No.511-20-6
Molecular FormulaC28H50
Molecular Weight386.70 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

aaa (20R,24S)-24-Methylcholestane CAS 511-20-6 chemical structure

Description

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.

aaa (20R,24S)-24-Methylcholestane (CAS 511-20-6), molecular formula C28H50 and molecular weight 386.70 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, aaa (20R,24S)-24-Methylcholestane (C28H50) contains an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 386.70 g/mol, it falls into the moderately-high-molecular-weight range. 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).

CATO manufactures aaa (20R,24S)-24-Methylcholestane under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

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.)1957

Recommended Standards

Why CATO?