9-Chloro-2-(4-methoxyphenyl)-1,10b-dihydrospiro[benzo[e]pyrazolo[1,5-c][1,3]oxazine-5,1'-cyclopentane] CAS 303061-30-5

Description

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.

CATO supplies 9-Chloro-2-(4-methoxyphenyl)-1,10b-dihydrospiro[benzo[e]pyrazolo[1,5-c][1,3]oxazine-5,1'-cyclopentane] (CAS 303061-30-5), a certified reference material (molecular formula C21H21ClN2O2, MW 368.86 g/mol) for analytical method development and quality control.

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 9-Chloro-2-(4-methoxyphenyl)-1,10b-dihydrospiro[benzo[e]pyrazolo[1,5-c][1,3]oxazine-5,1'-cyclopentane] is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 368.86 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.

Physical & Chemical Properties

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