OPTICAL BRIGHTNER OB CAS NO.7128-64-5

Chemical name:2.5-Bis-(5-tert-butyl-2-benzoxazolyl)thiophene

CAS No.:7128-64-5

Molecular formular:C₂₆H₂₆N₂O₂S

Molecular weight:430

Appearance: Slight greenish yellow powder

Assay,%:≥98.0

Melting point，℃：200–204

Volatility, %:≤0.5

Ash, %:≤0.5

Particle size: pass 200 mesh

Optical Brightener OB has excellent thermal stability, special whitening performance, good light stability and low volatility. It has an excellent blue effect. It is easily soluble in organic solvents and has good compatibility in different substrates. It is especially suitable for film and sheet for whitening and brightening of polyvinyl chloride, polystyrene, polyethylene polypropylene, thermoplastics, ABS, acetate, paints, paints and printing inks. The maximum absorption of the spectrum is 375 nm (in ethanol) and the maximum emission wavelength is 435 nm (in ethanol). info at hhochem. com