5-Oxopyrazolidine-3-carbonyl chloride CAS 64186-71-6

Description

Compared with other compounds in its class, the molecular weight of 148.55 g/mol gives 5-Oxopyrazolidine-3-carbonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

5-Oxopyrazolidine-3-carbonyl chloride (CAS 64186-71-6) is a high-purity analytical reference standard with the molecular formula C4H5ClN2O2 and a molecular weight of 148.55 g/mol.

5-Oxopyrazolidine-3-carbonyl chloride (C4H5ClN2O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

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

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