Thioctic Acid EP Impurity A CAS 1204245-29-3

Purity >95%In StockPharmacopoeial Impurity Standards
CAS No.1204245-29-3
Molecular FormulaC8H14O2S3
Molecular Weight238.39 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Thioctic Acid EP Impurity A CAS 1204245-29-3 chemical structure

Description

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.

CATO supplies Thioctic Acid EP Impurity A (CAS 1204245-29-3), a pharmacopoeial impurity reference standard (molecular formula C8H14O2S3, MW 238.39 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, Thioctic Acid EP Impurity A is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 238.39 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.

Physical & Chemical Properties

Molecular FormulaC8H14O2S3
Molecular Weight238.39 g/mol
Purity>95%
StorageStore at room temperature
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityStable under recommended storage conditions
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1990
Sulfur Atoms3

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