1-(4-Methoxyphenyl)-1H-pyrazole-4-carboxylic acid CAS 138907-79-6

Description

Compared with other compounds in its class, the molecular weight of 218.21 g/mol gives 1-(4-Methoxyphenyl)-1H-pyrazole-4-carboxylic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

1-(4-Methoxyphenyl)-1H-pyrazole-4-carboxylic acid (CAS 138907-79-6), molecular formula C11H10N2O3 and molecular weight 218.21 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 1-(4-Methoxyphenyl)-1H-pyrazole-4-carboxylic acid (C11H10N2O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 218.21 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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.

As a certified reference material (CRM), 1-(4-Methoxyphenyl)-1H-pyrazole-4-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

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