3-Chloro-4-methylthiophene-2-carbonyl chloride CAS 690632-13-4

Description

Compared with other compounds in its class, the molecular weight of 195.07 g/mol gives 3-Chloro-4-methylthiophene-2-carbonyl chloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

3-Chloro-4-methylthiophene-2-carbonyl chloride (CAS 690632-13-4) is a high-purity analytical reference standard with the molecular formula C6H4Cl2OS and a molecular weight of 195.07 g/mol.

Structurally, 3-Chloro-4-methylthiophene-2-carbonyl chloride (C6H4Cl2OS) contains sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 195.07 g/mol, it falls into the medium-molecular-weight range. 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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