KB-R 7943 CAS 182004-65-5

Purity 97%+In StockPharmaceutical Standards
CAS No.182004-65-5
Molecular FormulaC16H17N3O3S
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

KB-R 7943 CAS 182004-65-5 chemical structure

Description

KB-R 7943 (CAS 182004-65-5) is a high-purity analytical reference standard with the molecular formula C16H17N3O3SCH4O3S and a molecular weight of 427.49 g/mol.

The molecular framework of KB-R 7943 (C16H17N3O3SCH4O3S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

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 FormulaC16H17N3O3S CH4O3S
Molecular Weight427.49 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)9.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2009
Nitrogen Atoms3
Sulfur Atoms2

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