Product: Uvitex OB (OB)   Molecular formula: C26H26SO2N2 Molecular weight:430 575 Characteristics: Optical brightener OB is odorless crystal powder and appears bright yellow green. Its melting point is between 210-220℃,and its decomposition temperature is 440℃. It is hard to dissolve in water, soluble in hydrocarbon of methane series, fat, mineral oil, wax and common solvents. Its fluorescence color is blue. Technical parameters:    Appearance: bright yellow green crystal powder.    melting point: between 210-220℃    purity:≥99.5% Main use: It can be used to whiten PVC, polystyrene, polypropylene, PA, PMMA, PE,PP, Paint, coating, printing ink and so on. Package: Packaged in corrugated case, inside lining plastic bag.           Net weight is 10kg each case.http://www.opticalbrighteners.com