(VPBO), also commonly known as Basic Blue 7 , is a cationic dye belonging to the triarylmethane family. It is primarily utilized as a high-intensity colorant in industrial applications, particularly for dyeing textiles. In scientific research, it serves as a crucial analytical standard for identifying residues in food and biological samples. Chemical and Physical Properties Empirical Formula : Molecular Weight : 514.14 g/mol.

: Highly soluble in 95% ethanol, producing a deep blue solution. Wavelength Maximum ( λmaxlambda sub m a x end-sub ) : 619 nm. Industrial and Scientific Applications

: Typically found as a dark powder, crystals, or chunks.

: It is used as an ion-pairing reagent to determine the presence of metals like molybdenum (VI) and antimony in food and beverage samples.

: Although it has demonstrated therapeutic activity against parasitic fungi like Saprolegnia parasitica , its use in aquaculture is currently prohibited or banned in many regions.