Product description: Product name: BBOT Alias: C.I. Fluorescent Brightener 362; Uvitex 2B; TINOPAL CBS-X; UVITEX OB; UVITEX(R) 2B; TOSLAB 644820; 2,5-DI(5-TERT-BUTYLBENZOXAZOL-2-YL)THIOPHENE; 2,5-BIS(5'-TERT-BUTYL-2'-BENZOXAZOLYL)THIOPHENE; 2,5-BIS(5-TERT-BUTYL-2-BENZOXAZOLYL)THIOPHENE; 2,5-BIS(5-TERT-BUTYL-BENZOXAZOL-2-YL)THIOPHENE; 2,5-BIS(5-TERT-BUTYLBENZOXAZOYL)-2-THIOPHENE; 2,5-BIS(5-T-BUTYL-2-BENZOXAZOLYL)THIOPHENE CAS NO: 52232-33-4 Molecular weight: 430.56 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.