Chemical Name

2,5-BIS-(5-TERT-BUTYL-2-BENZOXAZOL-2-YL)THIOPHENE

The same name

FLUORESCENT BRIGHTENER OB, BBOT, TINOPAL OB-P,

OPTICAL BRIGHTENING AGENT OB C. I. 184

CAS NO.

7128-64-5

Molecular Formula

C26H26N2O2S

MW

430.56

EINECS Number

230-426-4

Appearance

Light yellow powder

Purity

98%

Solubility

Soluble alkanes, fats, mineral oil, paraffin and most organic solvents.

Spectrum maximum absorption value of 375nm (in ethanol)

Melting point

199-201 Celsius degree

Density

1.26

Hazard class Code

36/37/38

SAFETY INSTRUCTIONS

24/25

Application

OB widely used in PVC, PE, PP, PS, ABS and other thermoplastics, as well as paints, inks and coatings such as whitening.

(With plastic raw material weight percentage)

Usage

PVC Whitening: 0.01 ~ 0.05%

PVC :To improve brightness: 0.0001 ~ 0.001%

PS 0.0001 ~ 0.001% ABS: 0.01 ~ 0.05%

Polyolefin colorless matrix: 0.0005 ~ 0.001%

White Matrix: 0.005 ~ 0.05%

Packing

Packing in 25kg fiber drum or according to the requirement of the customers