Methyl 6-methyl-2-oxo-2H-pyran-5-carboxylate CAS 669-40-9

Purity 97%+In StockPharmaceutical Standards
CAS No.669-40-9
Molecular FormulaC8H8O4
Molecular Weight168.15 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Methyl 6-methyl-2-oxo-2H-pyran-5-carboxylate CAS 669-40-9 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.

Methyl 6-methyl-2-oxo-2H-pyran-5-carboxylate (CAS 669-40-9), molecular formula C8H8O4 and molecular weight 168.15 g/mol, is a CATO reference standard with documented purity and traceability.

Methyl 6-methyl-2-oxo-2H-pyran-5-carboxylate (C8H8O4) 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).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

Physical & Chemical Properties

Molecular FormulaC8H8O4
Molecular Weight168.15 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
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

Recommended Standards

Why CATO?