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Jinan, Shandong, China

Optical brightener OB-1 CAS 1533-45-5 4,4′-Bis(2-benzoxazolyl)stilbene

Optical brightener Ob-1 cas 1533-45-5 (2)
2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole CAS 1533-45-5(2)
Optical brightener Ob-1 cas 1533-45-5 (3)
Optical brightener Ob-1 cas 1533-45-5 (1)
Optical brightener Ob-1 cas 1533-45-5 (2)
2,2′-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole Quick Detail
  • English name: 2,2′-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole
  • Other Name: Optical brightener Ob-1 / 4,4′-Bis(2-benzoxazolyl)stilbene
  • CAS Number: 1533-45-5
  • Molecular Formula:C28H18N2O2
  • Molecular Weight: 414.45
  • EINECS Number: 216-245-3
  • Assay: 98.0%min
  • Appearance: Yellow greenish powder
2,2′-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole Specification
Item Specifications
Appearance Slight greenish yellow powder
Content (HPLC) 98~98.5%
Melting point 352~358℃
Ash content ≦0.5%
Volatile matter ≦0.5%
2,2′-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole Application
  • for the whitening of polyester fiber, nylon fiber and polypropylene fiber
  • for the whitening of polypropylene plastics, hard PVC, ABS, EVA, polystyrene and Makrolon
  • to be used in polyester and nylon
2,2′-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole Package

25 kg double lined bag paperboard barrel or Customized according to customer requirements


This product should be sealed in a cool and dry place.

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