Optical brightener OB (FBA 184)
CAS NO.: 7128-64-5
Structural formula: .jpg)
Appearance: light yellow or milk white powder
Purity: ≥99%
Melting point: 201-205℃
Solubility: poorly soluble in water, soluble in alkane, mineral oil, and common organic solvents.
Packing: 25KG fiber drum lined with double-layer plastic bag
Uses: in whitening and brightening PVC, polystyrene, polyethylene, polypropylene, thermoplastic plastic, ABS, cellulose acetate fiber, coating, paint, ink, etc.
Optical brightener OB-1 (FBA 393)
CAS NO.: 1533-45-5
Structural formula: 
Appearance: bright yellow green crystalline powder
Purity: ≥98.5%
Melting point: 355-360℃
Solubility: insoluble in water, soluble in benzene dichloride and other high boiling point organic solvents
Packing: 25KG fiber drum lined with double-layer plastic bag
Uses: in whitening polyester fiber, in whitening and brightening polyester, cotton and other fiber blended fabrics
Optical brightener OB-2
CAS NO.: 2397-00-4
Structural formula: 
Appearance: yellow crystalline powder
Purity: ≥98.5%
Melting point: ＞275℃
Uses: in whitening and brightening polyester fiber. It has favorable whitening and brightening effects to polyethylene, polypropylene, PVC and other plastics and products
Optical brightener OB-C
Appearance: light yellow powder
Melting point: 196-202℃
Packing: 25KG fiber drum lined with double-layer plastic bag
Uses: in non-transparent PVC plastics and other organic matters.
Plastic efficient Optical brightener OB-3
I. Technical index:
Appearance: yellow green powder
Active ingredient: ≥97%
Volatile matter: ≤0.5%
Melting point: ≥350℃
II. Features and uses:
1.Favorable heat stability.
2.OB-3 can be widely used in polyester fiber.
3.It is suitable for various polymers.
III. Method of application:
25-300PPM in new polymer and 300-400PPM for recycled material.
IV. Packing:
25kg paper barrel lined with double-layer plastic bag.