2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole

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Molecular Formula: C28H18N2O2 Molecular Weight: 414.4 CAS Number:1533-45-5 Properties: Optical brightener OB-1 is yellow crystalline solid. …

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Molecular Formula: C28H18N2O2 Molecular Weight: 414.4 CAS Number:1533-45-5 Properties: Optical brightener OB-1 is yellow crystalline solid. It is insoluble in water and odorless. Due to its excellent heat resistance nature, OB-1 has very stable performance in most polymers’ processing condition. Its maximum wavelength of absorption spectrum is 374 nm and emitting wavelength of fluorescence is 434 nm, which makes it has very strong fluorescence. Applications: Optical brightener OB-1 is a highly effective fluorescent whitening agent. It can be used in a variety of polymer substance, especially polyester fiber, PP fiber, polyamide fiber as well as plastic material such as PVC, ABS, EVA, PS, etc. Specifications: Properties Values Appearance Yellow crystalline solid Purity, % min 98 (LC) Melting point (DSC, °C), 359 – 366 Volatile Matter, % max 0.3 Ash, % max 0.5 Particle size, mesh 200

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