2-Mercaptopyridine N-oxide Sodium CAS 3811-73-2

Purity >95%In StockPharmaceutical Standards
CAS No.3811-73-2
Molecular FormulaC5H4NOS
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2-Mercaptopyridine N-oxide Sodium CAS 3811-73-2 chemical structure

Description

2-Mercaptopyridine N-oxide Sodium (CAS 3811-73-2) is a high-purity analytical reference standard with the molecular formula C5H4NOSNa and a molecular weight of 149.14 g/mol.

Owing to an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, 2-Mercaptopyridine N-oxide Sodium is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 149.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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 FormulaC5H4NOS Na
Molecular Weight149.14 g/mol
Purity>95%
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityLight-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)4.5
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1958
Nitrogen Atoms1
Sulfur Atoms1

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