2-Oxo-2H-pyran-6-carboxylic acid CAS 672-67-3

Purity 97%+In StockPharmaceutical Standards
CAS No.672-67-3
Molecular FormulaC6H4O4
Molecular Weight140.09 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2-Oxo-2H-pyran-6-carboxylic acid CAS 672-67-3 chemical structure

Description

2-Oxo-2H-pyran-6-carboxylic acid (CAS 672-67-3), molecular formula C6H4O4 and molecular weight 140.09 g/mol, is a CATO reference standard with documented purity and traceability.

Based on its molecular formula C6H4O4, 2-Oxo-2H-pyran-6-carboxylic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 140.09 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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.

As a certified reference material (CRM), 2-Oxo-2H-pyran-6-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC6H4O4
Molecular Weight140.09 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)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957

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