4-((3,5-Dimethyl-4-nitro-1h-pyrazol-1-yl)methyl)-5-methylisoxazole-3-carboxylic acid CAS 1006441-85-5

Description

Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 4-((3,5-Dimethyl-4-nitro-1h-pyrazol-1-yl)methyl)-5-methylisoxazole-3-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 280.24 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

4-((3,5-Dimethyl-4-nitro-1h-pyrazol-1-yl)methyl)-5-methylisoxazole-3-carboxylic acid (CAS 1006441-85-5) is a high-purity analytical reference standard with the molecular formula C11H12N4O5 and a molecular weight of 280.24 g/mol.

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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