CAS NO. 7128-64-5

Optical Brightener OB or CI184 CAS NO. 7128-64-5

Optical Brightener OB is highly effective in polymer substrates such as engineering plastics, e.g. PE, PC, PVC, PS, ABS, and PP, adhesive and other organic substrates.

Main applications include fibers, molded articles, films and sheets. And also can be used in clear lacquers, pigmented lacquers, paints, printing ink and synthetic leather. 
It will produce brilliant brightness with dyestuff, which is very efficient in directions for multicolor.

OB can be used as a tracer in a variety of applications.

OB features excellent resistance to heat, exceptional whitening properties, good light fastness and low volatility. It is readily soluble in organic solvents and features good compatibility
 in various substrates. The product is especially suitable for applications such as films and fiber.

OB enhances the whiteness of the substrate. In combination with dyes, the product produces particularly bright shades. Its excellent heat resistance renders OB suitable for all 
relevant processing conditions. It is suitable for packing applications but local regulations must be observed.

Specifications:

Appearance: Light yellow to milk-white powder

Purity: 99.0%min.

Melting Point: 201-205℃

Volatile Content: 0.5%max.

Ash Content: 0.2%max

Maximum absorption spectrum wavelength: 375nm(in Ethanol)

Maximum fluorescence emission wavelength: 435nm(in Ethanol)

Packing: 25kg/fiber drum with PE liner

If you are traders or end users of plastics products,kindly pls contact with us for more details of this product.