OPTICAL BRIGHTENER OB (CAS:7128-64-5)

Optical Brightener OB

CAS No.[7128-64-5]   2,5-Thiophenediylbis(5-tert-butyl-1,3-benzoxazole)

Optical Brightener OB is used as an brightener and to offset the yellowness of a polymer and yield a whiter appearance. Mainly used as thermoplastic (PVC, PS, PE, PP, ABS) optical brightener. Also for coatings, printing inks, paints, dyes, manufactured fibers, synthetic leather, waxes, fats, and oils. Recommend indoor use only.

C₂₆H₂₆N₂O₂S

Synonym Name

Uvitex Ob, Tinopal OB, Fluorescent Brightener 184 (FB 184) , c.i.184, Fluorescent Brightener OB

Specifications

Appearance: Yellowish or yellowish green crystal powder 

Assay: ≥99% 

 Melting Point: 196-203℃

Ash: ≤0.3% 

Volatile Content:≤ 0.3%

Particle size: 200 meshes

Application

> It can be used to whiten PVC, polystyrene, polypropylene, PA,  PMMA, PE,PP, Paint, coating, printing ink and so on. 

>If OB must be used in combination with a UV absorber, the absorption spectrum of the latter must leave an open window in the near UVA for the optical brightener ob.

>Recommended concentrations:0.02-5% depend on the application and degree of desired whiteness.

Packaging and Handling

Packaging: 25Kg/Plastic Drum

Store the product in a cool, dry, well-ventilated area away from incompatible materials. Unless stated, proper storage will permit usage of the product for 12 months from the manufacture date. For additional handling and toxicological information, consult the Material Safety Data Sheet.