Fluorescent brightener OB


Chemical name:
  • 2.5-bis(5-tertbutyl-2-benzoxazolyl)thiophene
Structural formula:

Molecular formula:
  • C26H26SO2N2
Molecular weight:
  • 430.575
  • Bright yellow green crystal powder, odorless, melting point:196-203°C, Decomposition temperature is large than 220°C. It is hard to dissolve in water. It dissolves in paraffin, fat, mineral oil, wax and common organic solvents. The hue of the fluorescent light is blue light. The wave length of the maximum absorptive light is 375nm(ethyl alcohol)
Technical conditions:
  • Appearance: Bright yellow green crystal powder.
  • Color light: Bright-colored blue fluorescent light (approximate to the standard sample)
  • Melting point: 196-203°C
  • Solid content: ≥99.5%
  • Fineness: Through 100 meshes.
  • It is used in thermoplastic plastics. PVC, PE, PP, PS, ABS, SAN, SB, CA, PA, PMMA, acrylic resin. polyester fibre paint, coating the brightening of prointing ink.
  • It is packed in bicorrugated paper box with a liner of plastic bag. The net weight of each box is 10kg.


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