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Optical Brightener OB-1
  • Chemicals structure of Optical brightener OB-1
    CAS Number :1533-45-5 EC Number:216-245-3
    Molecular Formular:C28H18N2O2 Molecular Weight:414.4547
    English name: Fluorescent Brightener 393 C.I: 393


    Item Index
    Appearance bright yellow crystalline powder
    Purity ≥99%
    Melting point 357-359°C
    Volatile conten ≤0.50%
    Ash content ≤0.10%

    Performance Features:

    1. High brightening intensity and strong fluorescence.
    2. Widely usage in brightening polyester, nylon fiber and all kinds of plastics.
    3. Carries good resistance to high temperature.


    1. Goes for the brightening of such chemical fibers of polyester, nylon and polyprolylene.
    2. Goes for the whitening and brightening of polypropylene plastic, hard PVC, ABS, EVA, polystyrene, polycarbonate, etc.
    3. Applicable to be added in the general polymerizations of polyester and nylon.

    Application Methods:

    Recommended quantity: Optical brightener OB-1 in every 1000kg raw material:
    1. 75~200g in EVA, polyprolylene, nylon, polycarbonate, and so on.
    2.75~300g in terylene fiber.

    • 1. Optical brightener OB-1, also called optical whitener OB-1

      2. Optical whiteners mainly used on PVC,ABS,EVA, PC and so on

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