Thioctic acid Impurity 25 CAS 728854-75-9

Purity 97%+In StockPharmacopoeial Impurity Standards
CAS No.728854-75-9
Molecular FormulaC10H20N2OS2
Molecular Weight248.41 g/mol
CategoryPharmacopoeial Impurity Standards / EP Impurities
AvailabilityIn Stock

Chemical Structure

Thioctic acid Impurity 25 CAS 728854-75-9 chemical structure

Description

Thioctic acid Impurity 25 (CAS 728854-75-9) is a certified pharmaceutical impurity reference standard with the molecular formula C10H20N2OS2 and a molecular weight of 248.41 g/mol.

Owing to an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, Thioctic acid Impurity 25 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 248.41 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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 FormulaC10H20N2OS2
Molecular Weight248.41 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)2.0
CAS Registry Year (est.)1986
Nitrogen Atoms2
Sulfur Atoms2

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