[2-[(3R,5R)-3,5-Bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]cyclohexylidene]ethyl]diphenylphosphine oxide CAS 139356-39-1

Purity 97%+In StockPharmaceutical Standards
CAS No.139356-39-1
Molecular FormulaC32H51O3PSi2
Molecular Weight570.89 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

[2-[(3R,5R)-3,5-Bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]cyclohexylidene]ethyl]diphenylphosphine oxide CAS 139356-39-1 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including [2-[(3R,5R)-3,5-Bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]cyclohexylidene]ethyl]diphenylphosphine oxide.

CATO supplies [2-[(3R,5R)-3,5-Bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]cyclohexylidene]ethyl]diphenylphosphine oxide (CAS 139356-39-1), a certified reference material (molecular formula C32H51O3PSi2, MW 570.89 g/mol) for analytical method development and quality control.

The molecular framework of [2-[(3R,5R)-3,5-Bis[[(1,1-dimethylethyl)dimethylsilyl]oxy]cyclohexylidene]ethyl]diphenylphosphine oxide (C32H51O3PSi2) is characterized by a phosphonate group, a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic 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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC32H51O3PSi2
Molecular Weight570.89 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature, protect from light, keep sealed and dry
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)7.5
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1996

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