5B(H)-Pregnane CAS 481-26-5

Purity 97%+In StockPharmaceutical Standards
CAS No.481-26-5
Molecular FormulaC21H36
Molecular Weight288.51 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5B(H)-Pregnane CAS 481-26-5 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 288.51 g/mol gives 5B(H)-Pregnane distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

5B(H)-Pregnane (CAS 481-26-5), molecular formula C21H36 and molecular weight 288.51 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 5B(H)-Pregnane (C21H36) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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.

As a certified reference material (CRM), 5B(H)-Pregnane 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.

Physical & Chemical Properties

Molecular FormulaC21H36
Molecular Weight288.51 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

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Why CATO?