Optical Brightener OB-1(C.I.393)

Optical Brightener OB-1(C.I.393) CAS NO.:1533-45-5

Optical Brightener OB-1 appears as a white to yellow powder with no distinct odor. The basic structure of this chemical consists of two benzoxazole rings connected by an ethylene bridge. It is sparingly soluble in water.

1.Item name:

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

2.Specifications:

CAS No.:1533-45-5

Assay:99.5%Min

Synonyms: 2, 2'-(1, 2-ethenediyldi-4, 1-phenylene)bisbenzoxazole; Fluorescent Brightener OB-1; Fluorescent Brightener 393; 2, 2-(4, -4`-Vinyl Biphenyl)Dual Benzoxazole
Structural No.: C. I. 393
Molecular formula: C28H18N2O2
Molecular weight: 414.4

EINECS:216-245-3

Structural formula:

3. Properties:

Appearance:Yellowish Green Granule
Melting point: 353-359℃

Boiling point:533.34°C (rough estimate)

Density:1.2151 (rough estimate)

Vapor pressure:0Pa at 25℃

refractive index:1.5800 (estimate)

Solubility:DMSO (Slightly, Heated)

Pka:1.45±0.10(Predicted)

Water Solubility:10μg/L at 25℃

Stability:Stable. Incompatible with strong oxidizing agents.

4. Application:

Optical Brightener OB-1 is the best whitening agent for polymer fiber, and it is also widely used in plastics, such as PP, ABS, PS, HIPS, PA, PC, EVA, rigid PVC etc.

5.Package:

Packed in 25kgs fiber drum with double PE liners, or according to customers' request.
6.Storage:

Sealed in dry,Room Temperature