91679-34-4 DL-4-Hydroxyphenyl(alanine-1-13C) DL-Tyrosine-1-13C CAS 91679-34-4

Description

CATO supplies 91679-34-4 DL-4-Hydroxyphenyl(alanine-1-13C) DL-Tyrosine-1-13C (CAS 91679-34-4), a certified reference material (molecular formula C8[13C]H17NO3, MW 188.23 g/mol) for analytical method development and quality control.

Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 91679-34-4 DL-4-Hydroxyphenyl(alanine-1-13C) DL-Tyrosine-1-13C is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 188.23 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.

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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