Optical Brightener OB


Chemical Name:


Synonym Name:

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


Appearance Slight greenish yellow powder
Dosage 0.01-0.05%
Melting point 196-200℃
Purity ≥99%
Solubility (g/100 g solution) at 20° C:
Acetone 0.5
Chloroform 14
Dimethylformamide 0.8
Dioxane 2
n-Hexane 0.2
Methanol <0.1
Methylethylketone 1.3
Tricresylphosphate 0.8
Xylene 5


>Features:Brilliant bluish whitening effects; excellent heat resistance; high chemical stability; good compatibility in a wide range of resin.

>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.

>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.

Handing and Safety: 

>FDA approved for use in polymers subject to the limitations in 21 CFR §176.170(c).

>For additional handing and toxicological information, please consult us for Maternal Safety Date Sheet.


25kg per fiber drum, 6*2 layer 12 drum per pallet, 5CBM per ton,or according to customers’ requirements.