Montelukast Impurity 54 CAS 89729-09-9

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.89729-09-9
Molecular FormulaC5H8O3S
Molecular Weight148.18 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Montelukast Impurity 54 CAS 89729-09-9 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 148.18 g/mol gives Montelukast Impurity 54 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Montelukast Impurity 54 (CAS 89729-09-9), a pharmacopoeial impurity reference standard (molecular formula C5H8O3S, MW 148.18 g/mol) used for the identification and quantification of trace impurities in APIs.

Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, Montelukast Impurity 54 is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 148.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

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 FormulaC5H8O3S
Molecular Weight148.18 g/mol
Purity97%+
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityHygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1982
Sulfur Atoms1

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