Direct Blue 218 CAS 28407-37-6

Purity Technical GradeIn StockPharmaceutical Standards
CAS No.28407-37-6
Molecular FormulaC32H16Cu2N6O16S4
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Direct Blue 218 CAS 28407-37-6 chemical structure

Description

CATO supplies Direct Blue 218 (CAS 28407-37-6), a certified reference material (molecular formula C32H16Cu2N6O16S4Na, MW 1018.83 g/mol) for analytical method development and quality control.

Direct Blue 218 (C32H16Cu2N6O16S4Na) 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).

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 FormulaC32H16Cu2N6O16S4 4*Na
Molecular Weight1018.83 g/mol
PurityTechnical Grade
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)28.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1965
Nitrogen Atoms6
Sulfur Atoms4

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