2,4-Diaminoquinazoline-6-sulfonamide CAS 21811-06-3

Purity 97%+In StockPharmaceutical Standards
CAS No.21811-06-3
Molecular FormulaC8H9N5O2S
Molecular Weight239.25 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2,4-Diaminoquinazoline-6-sulfonamide CAS 21811-06-3 chemical structure

Description

2,4-Diaminoquinazoline-6-sulfonamide (C8H9N5O2S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

2,4-Diaminoquinazoline-6-sulfonamide (CAS 21811-06-3) is a high-purity analytical reference standard with the molecular formula C8H9N5O2S and a molecular weight of 239.25 g/mol.

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 FormulaC8H9N5O2S
Molecular Weight239.25 g/mol
Purity97%+
StorageStore at 2-8°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)7.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1963
Nitrogen Atoms5
Sulfur Atoms1

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