Product name: Fluorescent Brightener 393 Alias: Fluorescent Brightener OB-1; FBA393;2,2'-(4.4'-diphenol vinyl)di-henzoxazol ; 2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole; FBA 393; 4,4'-bis(benzoxazol-2-yl)stilbene; Optical Brightener OB-1; C.I. 393; Fluorescent whtening agent OB-1; ; 2,2'-(ethene-1,2-diyldibenzene-4,1-diyl)bis(1,3-benzoxazole); 2,2'-[(E)-ethene-1,2-diyldibenzene-4,1-diyl]bis(1,3-benzoxazole) CAS NO: 1533-45-5 EC NO: 216-245-3 Molecular weight: 414.4547 Structural Formula: Appearance: bright yellow crystalline powder Assay: ≥99.0% Melting Point: 357-359°C Volatile Matters: ≤0.5% Ash: ≤0.1% Uses: This brightener is especially suitable for the p molding processing of a variety of plastics and plastic products at high temperatures; because of its excellent heat resistance, light resistance,resistance to chlorine bleaching properties,it offers good effects to the whitening of polyester fibers and polyester and cotton and other fiber blended fabrics, and can be used for the whitening of polyester dope, similar products are: Whitex SNK, Uvitex ERT, Eastobrite OB-1.

CAS NO:1533-45-5

EC NO:216-245-3

Molecular Formula:C₂₈H₁₈N₂O₂

Molecular Weight:414.4547

Synonyms:;Fluorescent Brightener OB-1;FBA393；2,2'-(4.4'-diphenol vinyl)di-henzoxazol ;2,2'-(1,2-Ethenediyldi-4,1-phenylene)bisbenzoxazole;FBA 393;4,4'-bis(benzoxazol-2-yl)stilbene;Optical Brightener OB-1;C.I. 393;Fluorescent whtening agent OB-1;Fluorescent Whitening Agent OB-1;2,2'-(ethene-1,2-diyldibenzene-4,1-diyl)bis(1,3-benzoxazole);2,2'-[(E)-ethene-1,2-diyldibenzene-4,1-diyl]bis(1,3-benzoxazole);Optical Brightening Agent OB-1;Optical Brightner OB-1;ptical Brightening Agent OB-1;4,4-Bis(2-Benzoxazolyl) Stilbene;

Molecular Structure: