5-(tert-Butyl)-2-(3-chloro-4-methylphenyl)benzo[d]oxazole CAS 42196-68-9

Description

The occurrence of 5-(tert-Butyl)-2-(3-chloro-4-methylphenyl)benzo[d]oxazole is closely related to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

5-(tert-Butyl)-2-(3-chloro-4-methylphenyl)benzo[d]oxazole (CAS 42196-68-9), molecular formula C18H18ClNO and molecular weight 299.79 g/mol, is a CATO reference standard with documented purity and traceability.

The molecular framework of 5-(tert-Butyl)-2-(3-chloro-4-methylphenyl)benzo[d]oxazole (C18H18ClNO) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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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