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Fluorescent Brightener OB CAS 7128-64-5

Chemical name:2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene

Synonymous names:

Fluorescent Brightener 184;

C.I.184

CAS No: 7128-64-5

Molecular formula:C26H26N2O2S

Content:≥99.0%

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Structural formula:

图片1

Product Description:

Appearance Solid powder

light green to yellow
Purity mass fraction (HPLC)% ≥99.0
melting point 199-201 °C(lit.)
Maximum absorption wavelength 375nm
Maximum reflection (in ethanol) 435-445nm
Color light blue white light
Mass fraction of water-insoluble matter/% 1.0
Flammability Y
Stability Y

Properties and Usage:

Fluorescent whitening agent OB, as a multi-functional whitening agent, is widely used in plastics, chemical fibers, inks, coatings and other fields, and is recognized as one of the excellent varieties in the industry. Its main features include low usage, high whiteness and strong fluorescence, especially in the transparent manufacturing of resins. Fluorescent whitening agent OB also has the advantages of heat resistance, weather resistance, stable color and non-yellowing, etc., allowing it to maintain stable performance in various environments and conditions.

During use, the application is very flexible. It can be directly added to the monomer or prepolymer during polymerization, condensation, and addition polymerization. It can also be added in the form of powder or masterbatch before or during the formation of plastics and chemical fibers. , can achieve excellent whitening effect. It has a wide range of uses. It is not only suitable for whitening treatment of plastic products such as polyvinyl chloride, polystyrene, ABS resin, polyolefin and polyester, but also can be used for the whitening treatment of acetate fiber, polymethyl methacrylate, foam artificial leather and other materials. Whitening. In addition, it can also be used for the whitening treatment of varnishes, paints, UV-curable coatings, printing inks, fats, oils, packaging materials, etc. It can even be used in printing inks as anti-counterfeiting marks to improve the whiteness of photos and produce whitening. Brightening effect.

Packaging specifications:

25kg/barrel cardboard drum; dry storage

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