OPTICAL BRIGHTENER OB-1 C.I.393 CAS NO.1533-45-5

appearance: yellowish green powder
melting point: 350~360°c
purity:≥98.0%

c.i.no.: 393 chemical name: 2.2’-(4.4’-diphenol vinyl) dibenzoxazol cas no: 1533-45-5 formula: c28h18n2o2 melting point: 357~359°c application: mainly be used in whitening of polyester and plastic, as well in whitening of pet, nylon during polymerization.

company introduction

1. established in 2005, with two independent business divisions: fine chemicals division; pharmaceutical division.

a. "top 100 innovation-oriented export enterprises of hangzhou" honored by hangzhou government

b. specialized in the fine chemicals and pharmaceuticals

c. a leading manufacturer and trader of apis in china

2. main product:

• optical brightener
• textile auxiliary
• dye stuff
• pigments
• pharmaceutical active ingredients
• pharmaceutical intermediates
• feed additives

3. company picture

product description

identification of 1533-45-5

name:

benzoxazole,2,2'-(1,2-ethenediyldi-4,1-phenylene)bis-

einecs:

216-245-3

molecular formula:

c₂₈h₁₈n₂o₂

cas registry number:

1533-45-5

synonyms:

benzoxazole,2,2'-(vinylenedi-p-phenylene)bis- (7ci,8ci); 2,2'-(vinylenedi-p-phenylene)bisbenzoxazole; 4,4'-di(benzoxazol-2-yl)stilbene; c.i. 40674; eastobrite ob 1; fluorescent brightener 393; opticalbrightener 1; uvitex ob-one;

inchi:

inchi=1/c28h18n2o2/c1-3-7-25-23(5-1)29-27(31-25)21-15-11-19(12-16-21)9-10-20-13-17-22(18-14-20)28-30-24-6-2-4-8-26(24)32-28/h1-18h/b10-9+

molecular structure:

chemical properties

appearance:

solid

molecular weight:

414.46

density:

1.39 g/cm3 (25 c)

boiling point:

566.8 °c at 760 mmhg

melting point:

357-359℃

flash point:

285.1 °c

storage temperature:

keep container closed when not in use. store in a cool, dry, well-ventilated area away from incompatible substances.

refractive index:

1.731

solubility:

insoluble

stability:

stable. incompatible with strong oxidizing agents.