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Fluorescent Brightener PB
Chemical name: 2,5-bis-(benzoxazol-2-)thiophene
Structural formula:
CI NO.:C.I.FLUORESCENT BRIGHTENER 185
CAS NO.:2866-43-5
EC NO.:220-685-1
Molecular formula: C18H10N2O2S
Molecular weight: 318
Properties: The product is a light yellow crystal powder.Its melting point is 216-220°C(chlorobenzene recrystalization),insoluble in water,soluble in organic solvent and concentrated acid. It has bright blue fluorescence.The maximum absorption wavelength is 367nm(DMF),the maximun emission wavelength is 429nm.
Technical conditions:
Appearance: bright -colored light yellow crystal power
Chromatic light: blue fluorescent light (similar to the standard product)
Melting point: 216-220°C
Content of solid: ≥99.5%
Fineness : through 100 meshes
Use: It is mainly used for making commercialized Brightener -EBF,and can also used for whitening and brightening various of polyolefin plastics, ABS engineering plastics and organic glass.
Package: 10-25KG cardboard drum lined with double plastic bags or according to the requirement of the users.
