Fluorescent Brightener OB
1) Chemical name: 2,2-(2,5-thiophenediyl) bis [5-(1,1-dimethylethy)]
benzoxazole
2) Index number: C.I.184
3) CAS number: 7128-64-5
4) Molecular formula: C27H28O2N2S
5) Appearance: light yellow or milk white power
6) Structure: benzoxazole type compound
7) Melting point: 201  202oC
8) Purity: ≥ 99.0%
9) Ash: ≤ 0.3%
10) Max. volatile content: 0.3%
11) Particle size: 200meshes
12) Max. absorption wavelength in ethanol: 375nm
13) Solubility: soluble in paraffin, mineral oils, and ordinary organic
solvents

Fluorescent Brightener OB-1
1) Chemical name: 2,2-(1,2-ethenediyldi-4, 1-phenylene) bisbenzoxazole
2) Index number: C.I.393
3) CAS number: 1533-45-5
4) Appearance: bright yellow crystalline power
5) Structure: diphenylethylene bisbenzoxazole compound
6) Melting point: 355  360oC
7) Purity: ≥ 99.0%
8) Ash: ≤ 0.3%
9) Max. volatile content: 0.3%
10) Particle size: 200meshes
11) Solubility: soluble in high boiling point organic solvents such as
phenyl-chloride
12) Properties: difficult to heat and light due its high boiling point
and extra strong resistance to chlorine-bleaching

Inner packing:
Double PE bags

Outer packing:
1kg barrel or, 5, 10, or 25kg fiber drum