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Optical brightener OB-1 CAS#1533-45-5

Optical brightener OB-1 CAS#1533-45-5 Promotion Season Now in Store and Free Sample for Testing with Factory Price

Chemical Name:Optical brightener

CAS No.1533-45-5

Molecular Formula:C28H18N2O2

Molecular weight:414.45

Sample: Available

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Product Details

Products Description of Optical brightener OB-1 CAS#1533-45-5

Fluorescent whitening agent OB-1, 2,2-(4,4-diphenylethylene) bisbenzoxazole, is a yellow crystalline substance with a melting point of 359-362℃, insoluble in water, odorless, stable performance, and a maximum absorption spectrum wavelength of 374nm. It has strong fluorescence and a fluorescence emission wavelength of 434nm. Fluorescent whitening agent OB-1 is a highly efficient fluorescent whitening agent for polyester fibers.

Fluorescent whitening agents can absorb invisible ultraviolet light (wavelength range is about 360-380nm) and convert it into blue light or purple visible light with a longer wavelength, thereby compensating for the unwanted yellowish color in the matrix and reflecting more visible light in the range of 400-600nm than the original incident wavelength, making the product appear whiter, brighter, and more colorful.

Optical brightener OB-1 Chemical Properties

Melting point	>300 °C(lit.)
Boiling point	533.34°C (rough estimate)
density	1.2151 (rough estimate)
vapor pressure	0Pa at 25℃
refractive index	1.5800 (estimate)
storage temp.	Sealed in dry,Room Temperature
solubility	DMSO (Slightly, Heated)
pka	1.45±0.10(Predicted)
form	Solid
color	Yellow
Water Solubility	10μg/L at 25℃
Stability:	Stable. Incompatible with strong oxidizing agents.
InChIKey	ORACIQIJMCYPHQ-KTKRTIGZSA-N
LogP	5.499 at 25℃
CAS DataBase Reference	1533-45-5(CAS DataBase Reference)
EPA Substance Registry System	Benzoxazole, 2,2'-(1,2-ethenediyldi-4,1-phenylene)bis- (1533-45-5)

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-37/39-24/25
WGK Germany	1
HS Code	29349990

Product Application of Optical brightener OB-1 CAS#1533-45-5

Fluorescent brightener OB-1 is a new product developed abroad, suitable for whitening and brightening PE, PVC, ABS, PC and other plastics. It has low dosage, strong adaptability and good dispersibility. It can be added during post-processing or polymerization. The whitened material has high whiteness and excellent heat and weather resistance. OB-1 can also be made into a slurry for whitening textiles.

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