5,7-Diphenyl-pyrazolo[1,5-α]pyrimidine-3-carboxylic Acid Ethyl Ester CAS 895764-31-5

Description

5,7-Diphenyl-pyrazolo[1,5-α]pyrimidine-3-carboxylic Acid Ethyl Ester (CAS 895764-31-5) is a high-purity analytical reference standard with the molecular formula C21H17N3O2 and a molecular weight of 343.38 g/mol.

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, 5,7-Diphenyl-pyrazolo[1,5-α]pyrimidine-3-carboxylic Acid Ethyl Ester is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 343.38 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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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