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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
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