Chemical Name:
2,5-Thiophenediylbis(5-tert-butyl-1,3-benzoxazole)
| Formula | C26H26N2O2S |  |
| MW | 430 | |
| CAS# | 7128-64-5 |
Synonym Name:
BASF Uvitex Ob, Tinopal OB, Fluorescent Brightener 184 (FB 184) , c.i.184, Fluorescent Brightener OB
Specification:
| Appearance | Slight greenish-yellow powder |
| Dosage | 0.01-0.05% |
| Melting point | 196-200℃ |
| Purity | ≥99% |
| Solubility | (g/100 g solution) at 20° C: |
| Acetone | 0.5 |
| Chloroform | 14 |
| Dimethylformamide | 0.8 |
| Dioxane | 2 |
| n-Hexane | 0.2 |
| Methanol | ＜0.1 |
| Methylethylketone | 1.3 |
| Tricresylphosphate | 0.8 |
| Xylene | 5 |
Application:
>Optical Brighteners are used to offset the yellowness of a polymer and yield a whiter appearance. OB is used as a thermoplastic (PVC, PS, PE, PP, ABS) optical brightener. Also for coatings, printing inks, paints, dyes, manufactured fibers, synthetic leather, waxes, fats, and oils. Ob is a general-purpose optical brightener agent.
>Recommended concentrations: 0.02-5% depending on the application and degree of desired whiteness.
Package
25kg per fiber drum, 6*2 layer 12 drums per pallet, 5CBM per ton, or according to customers’ requirements.
