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Optical Brightener Eastobrite OB-1

TDS of optical brightener ob-1

Product name Optical brightener ob-1
Chemical 4,4′-bis(benzoxazol-2-yl)stilbene
CAS: 1533-45-5
chemical structure: C28H18N2O2
Equivalents: Eastobrite OB-1, Uvitex OB one,FBA 393, CI 393, OBA 393
Features optical brightener ob-1 is a universal plastic OBA.
excellent brightening ability, good thermal stability, and compatibility with many polymers.
Specifications: Ash % 0.5max
Formula C28H18N2O2
Melting Point (DTA) 359-361℃
Appearance Greenish / Yellowish Color Shade Powder
Odor Free of odor
Volatile Content % 0.5max
Assay % 98.5%
Particle Size 300 meshes
Application: Suite for fibers and in engineering plastics
Handing and Safety: FDA cleared for use in all polymers
For additional handing and toxicological information, please consult us for Maternal Safety Date Sheet.
Packing: 25kg / fiber drum with PE liner, inside lining plastic bag.

COA of optical brightener ob-1

Items Standard Value Test Result
Appearance Yellowish greenish crystal powder Yellowish greenish crystal powder
Melting Point 350-370℃ 364℃
Purity ≥98.5% 99.00%
Color Shade blue blue
Fineness ≧200 mesh 200 mesh
Water-fast Content ≦0.5% 0.24%



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