4-(Methylthio)-2-oxobutanoic acid CAS 583-92-6

Purity 97%+In StockPharmaceutical Standards
CAS No.583-92-6
Molecular FormulaC5H8O3S
Molecular Weight148.18 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-(Methylthio)-2-oxobutanoic acid CAS 583-92-6 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.

4-(Methylthio)-2-oxobutanoic acid (CAS 583-92-6), molecular formula C5H8O3S and molecular weight 148.18 g/mol, is a CATO reference standard with documented purity and traceability.

4-(Methylthio)-2-oxobutanoic acid (C5H8O3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.

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.

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.)1957
Sulfur Atoms1

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