Fluorescent brightener OB C.I.Index No.: Fluorescent brightener 184 Trade Name of Foreign Similar Product: Uvitex OB Appearance: light yellow or ivory-white powder Melting Point: 201-202 Solubility: difficult to dissolve in the water; soluble in alkane, mineral oil and typical organic solvents. Uses: used to whiten thermoplastic plastics, PVC, polystyrene, polyethylene, polypropylene, ABS, paint, printing inks, etc. DOSAGE(per 100kg polymer): PVC white 0.01-0.05%(10-50g)you can adjust the dosage according the using effectTransparent 0.0001-0.001%(0.1-1g) PS white 0.001%(about 1g) transparent 0.0001-0.001%(0.1-1g) ABS natural color 0.01-0.05%(10-50g) white 0.01-0.05%(10-50g) PE,PP colorless 0.0005-0.001%(0.5-1g) white 0.005-0.05%(5-50g) Other plastic are like above PACKAGING:Packaged in cardboard barrels,50kg or 25kg each.