1-methylcyclobutane-1-carbonyl chloride CAS 21890-82-4

Description

The occurrence of 1-methylcyclobutane-1-carbonyl chloride is closely related to a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

1-methylcyclobutane-1-carbonyl chloride (CAS 21890-82-4), molecular formula C6H9ClO and molecular weight 132.59 g/mol, is a CATO reference standard with documented purity and traceability.

1-methylcyclobutane-1-carbonyl chloride (C6H9ClO) contains a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; 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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