Optical Brightener OB-1, Eastobrite OB-1 Supplier & Mfg info@www.additivesforpolymer.com

Optical Brightener Eastobrite OB-1

Chemical Name:


Formula C28H18N2O2  
MW      414
CAS# 1533-45-5

Synonym name:

Fluorescent Brightener 393 (FB 393 ) , C.I.393,  Fluorescent Brightener OB-1, Eastobrite OB-1


Appearance yellowish or greenish


Melting point 357-359℃
Solubility (g/100 g solution) at 20° C:
Acetone <0.1
Chloroform <0.1
Hexane <0.1
Methanol <0.1
Water <0.1


>FeaturesBrilliant, neutral white cast that compensates for yellowing; Low volatility and excellent heat resistant make the product ideal for use in fibers and in engineering plastics processed at high temperatures; Good light fastness;

>OB-1 is excellent oxazole type brightener, Mainly used in whitening of polyester and ABS, PS, HIPS, PA, PC, PP, EVA, rigid PVC etc., also used as nylon fluorescent brightener.

>Recommended concentrations:0.005-0.2% depend on the application and degree of desired whiteness.

Handing and Safety: 

>FDA cleared for use in all polymers

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


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


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