Ethyl 2-hydroxy-6-methyl-4-oxocyclohex-2-ene-1-carboxylate CAS 21855-43-6

Description

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.

Ethyl 2-hydroxy-6-methyl-4-oxocyclohex-2-ene-1-carboxylate (CAS 21855-43-6), molecular formula C10H14O4 and molecular weight 198.22 g/mol, is a CATO reference standard with documented purity and traceability.

Ethyl 2-hydroxy-6-methyl-4-oxocyclohex-2-ene-1-carboxylate (C10H14O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

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

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