7-Hydroxy-8-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-1,3-Naphthalenedisulfonate Sodium CAS 374784-31-3

Purity 97%+In StockPharmaceutical Standards
CAS No.374784-31-3
Molecular FormulaC18H13N2O11S3
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

7-Hydroxy-8-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-1,3-Naphthalenedisulfonate Sodium CAS 374784-31-3 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 552.48 g/mol gives 7-Hydroxy-8-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-1,3-Naphthalenedisulfonate Sodium distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

7-Hydroxy-8-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-1,3-Naphthalenedisulfonate Sodium (CAS 374784-31-3) is a high-purity analytical reference standard with the molecular formula C18H13N2O11S3Na and a molecular weight of 552.48 g/mol.

Based on its molecular formula C18H13N2O11S3Na, 7-Hydroxy-8-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-1,3-Naphthalenedisulfonate Sodium contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 552.48 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

Molecular FormulaC18H13N2O11S3 3*Na
Molecular Weight552.48 g/mol
Purity97%+
StorageStore in a cool place (≤25°C), protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)13.5
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Nitrogen Atoms2
Sulfur Atoms3

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