Optical Brightener OB-1 CAS 1533-45-5

Item Name:
Optical Brightener OB-1
Fluorescent Brightener 393

C.I.No : 393

Main Chemical:
4,4′-Bis(2-benzoxazolyl)stilbene

CAS No.: 1533-45-5

Category:

Technical Specs of OB-1 Optical Brightener

Technical Specs Index
Appearance bright yellow powder
Purity ≥99.0%
Melting Point 358-360℃
Volatiles ≤0.5%
Ash ≤0.1%

Properties of OB-1 Optical Brightener

Optical Brightener OB-1 is insoluble in water, but soluble in high boiling point organic solvents such as benzene dichloride. It has high whitening strength, strong fluorescence, excellent high temperature and weather resistance. But the added amount cannot exceed the peak value , otherwise it’ll precipitate.

Applications of OB-1 Optical Brightener

Optical Brightener OB-1 is widely used in whitening of various plastics, polyester fibers and blended fibers, etc.:

  1. Suitable for whitening polyester fiber, nylon fiber, polypropylene fiber and other chemical fibers.
  2. Suitable for whitening and brightening of polypropylene plastic, rigid PVC, ABS, EVA, polystyrene, polycarbonate, etc.
  3. Suitable for the addition of polyester and nylon in conventional polymerization.
  4. Especially suitable for whitening of plastic products formed at high temperature.

Packaging and Storage

OB-1 Optical Brightener is packed 25kg per fiber drum lined with plastic bag, stored in cool and dry place without direct sunlight. Shelf life is 2 years.