4-Methyl-5-oxo-2,5-dihydrofuran-3-carboxylic acid CAS 133331-12-1

Purity 97%+In StockPharmaceutical Standards
CAS No.133331-12-1
Molecular FormulaC6H6O4
Molecular Weight142.11 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

4-Methyl-5-oxo-2,5-dihydrofuran-3-carboxylic acid CAS 133331-12-1 chemical structure

Description

4-Methyl-5-oxo-2,5-dihydrofuran-3-carboxylic acid (CAS 133331-12-1) is a high-purity analytical reference standard with the molecular formula C6H6O4 and a molecular weight of 142.11 g/mol.

4-Methyl-5-oxo-2,5-dihydrofuran-3-carboxylic acid (C6H6O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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 FormulaC6H6O4
Molecular Weight142.11 g/mol
Purity97%+
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO, water
StabilityMay oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1995

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