Butylphthalide Impurity 74 CAS CATO-C4X-181374

Description

Compared with other compounds in its class, the molecular weight of 396.52 g/mol gives Butylphthalide Impurity 74 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

CATO supplies Butylphthalide Impurity 74 (CAS CATO-C4X-181374), a pharmacopoeial impurity reference standard (molecular formula C25H32O4, MW 396.52 g/mol) used for the identification and quantification of trace impurities in APIs.

Structurally, Butylphthalide Impurity 74 (C25H32O4) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 396.52 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.

Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.

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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