Optical Brighter OB-CAS 7128-64-5powder-1

Optical Brighter OB-CAS 7128-64-5powder-2

Optical Brighter OB-CAS 7128-64-5powder-3

Optical Brighter OB-CAS 7128-64-5-pack-1

Optical Brightener OB CAS 7128-64-5

CAS: 7128-64-5

Purity: 99%

Molecular Formula: C26H26N2O2S

Molecular Weight: 430.56

EINECS: 230-426-4

Storage Period: Sealed storage

Synonyms: bbot150 ;DERIVATIVE OF STILBENE DISULFONIC ACID;BBOT;2,5-BIS(5-TERT-BUTYL-BENZOXAZOL-2-YL)THIOPHENE;Fluorescent whitening agent OB;Optical Brightener OB;EUTEX-OB RC EXTRA

What is Optical Brightener OB CAS 7128-64-5 ？

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene is yellow-green powder. The melting point is 200 ~ 201℃, and the decomposition temperature is greater than 220℃. Insoluble in water, soluble in alkanes, fats, mineral oils, waxes and common organic solvents.

Application

Optical Brighter OB used for brightening polyvinyl chloride, polystyrene, ABS resin, polyolefin and polyester, also used for acetate fiber, polymethyl methacrylate, foam leather whitening. Also used in varnishes, paints, UV-curable coatings, printing inks, fats, oils, packaging materials. It can be used as anti-counterfeiting mark in printing ink. In photography, it can be used to improve the whiteness of the non-image area of the photo, which can be converted into fluorescence when the photo is irradiated by ultraviolet light. Produce brightening effect.

Specification

Product Name	Optical brightener OB (C.I. 184 / C.I.28 )
MF	C26H26N2O2S
EINECS No	230-426-4
CAS No	7128-64-5,
Chemical Name	2,5-bis(5-tert-butyl benzoxazoly-2’-)thiophene
Appearance	Light green powder
Purity	≥98%
Melting point	198~202 °C
Volatile:	<0.5%
Package	20kg per carton, 25/30kg per fiber drum with PE liner, or as per the customers’ requirements.
Applications: It is widely used in thermoplastic such as PVC, PE, PP, ABS, PS, and unsaturated resin and paint, ink and oil soluble coatings.
Properties: The product is light green or green powder, non-toxic and tasteless, can dissolve in alkane, fat, mineral oil, paraffin and most organic solvents, the absorption spectra of the largest value for 375 mm (in ethanol).
Dosage: PVC whitening: 0.01~0.05%; Polystyrene :0001~0.001%; Polyolefin matrix: 0.0005~0.001%		to improve the light intensity: 0.0001~0.001% ABS:0.01~0.05%; White matrix: 0.005~0.05%

Features

Mainly used for brightening synthetic fiber and plastic products, and has obvious effect on colorful plastic products, and is also used for PE, PP, PVC, PS, ABS and so on.