5-Chloro-2h-benzo[b][1,4]thiazin-3(4H)-one CAS 73500-76-2

Purity 97%+In StockPharmaceutical Standards
CAS No.73500-76-2
Molecular FormulaC8H6ClNOS
Molecular Weight199.66 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Chloro-2h-benzo[b][1,4]thiazin-3(4H)-one CAS 73500-76-2 chemical structure

Description

The occurrence of 5-Chloro-2h-benzo[b][1,4]thiazin-3(4H)-one is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

5-Chloro-2h-benzo[b][1,4]thiazin-3(4H)-one (CAS 73500-76-2) is a high-purity analytical reference standard with the molecular formula C8H6ClNOS and a molecular weight of 199.66 g/mol.

The molecular framework of 5-Chloro-2h-benzo[b][1,4]thiazin-3(4H)-one (C8H6ClNOS) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 FormulaC8H6ClNOS
Molecular Weight199.66 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1978
Halogen ContentCl-containing
Nitrogen Atoms1
Sulfur Atoms1

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