2-Amino-5-([4-sulfophenyl]azo)benzenesulfonic acid monosodium salt 4-Amino-1,1 inverted exclamation marka-azobenzene-3,4 inverted exclamation marka-disulfonic acid monosodium salt 74543-21-8 Acid Yellow 9 monosodium salt CAS 74543-21-8

Description

The occurrence of 2-Amino-5-([4-sulfophenyl]azo)benzenesulfonic acid monosodium salt 4-Amino-1,1 inverted exclamation marka-azobenzene-3,4 inverted exclamation marka-disulfonic acid monosodium salt 74543-21-8 Acid Yellow 9 monosodium salt is closely related to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

2-Amino-5-([4-sulfophenyl]azo)benzenesulfonic acid monosodium salt 4-Amino-1,1 inverted exclamation marka-azobenzene-3,4 inverted exclamation marka-disulfonic acid monosodium salt 74543-21-8 Acid Yellow 9 monosodium salt (CAS 74543-21-8) is a high-purity analytical reference standard with the molecular formula C12H22N3O6S2Na and a molecular weight of 391.43 g/mol.

Based on its molecular formula C12H22N3O6S2Na, 2-Amino-5-([4-sulfophenyl]azo)benzenesulfonic acid monosodium salt 4-Amino-1,1 inverted exclamation marka-azobenzene-3,4 inverted exclamation marka-disulfonic acid monosodium salt 74543-21-8 Acid Yellow 9 monosodium salt contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 391.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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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