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Optical Brightener OB-1 Yellow Phase

Product name: 2,5-Bis(5-tert-butylbenzooxazol-2-yl)thiophene

Molecular weight: 414.4

CAS No.: 1533-45-5

C.I. No.: 393

Synonyms: Optical Brightener Agent OB-1; Fluorescent Brightener 393; F Fluorescent Brightener OB-1; FBA 184

OB-1 is an efficient fluorescent brightener for polyester fibers， also widely used in ABS, PS, HIPS, PA(NYLONG), PC, PP, EVA, rigid PVC and other plastics. It has features like excellent whitening effect, excellent thermal stability, very little addition, etc.

Specifications:

Appearance: Bright yellow powder

Purity: 99.0%min.

Melting Point: 355-360℃

Volatile Content: 0.5%max.

Burning residue: 0.5%max

Maximum absorption spectrum wavelength: 374nm

Maximum fluorescence emission wavelength: 434nm

Packing: 25kg/fiber drum with PE liner