Optical Brightening Agent 393
| Product Name | Optical Brightening Agent 393 |
| Synonyms | Fluorescent Brightener OB-1; 2,2'-(4.4'-diphenol vinyl)di-henzoxazol; 2,2'-[(E)-ethene-1,2-diyldibenzene-4,1-diyl]bis(1,3-benzoxazole) |
| Molecular Formula | C28H18N2O2 |
| Molecular Weight | 414.4547 |
| CAS Registry Number | 1533-45-5 |
| EINECS | 216-245-3 |
| Molecular Structure |  |
| Density | 1.281g/cm3 |
| Melting point | 357-359℃ |
| Boiling point | 566.8°C at 760 mmHg |
| Refractive index | 1.731 |
| Flash point | 285.1°C |
| Vapour Pressur | 2.79E-12mmHg at 25°C |
| Properties: | |
| Appearance: light yellow crystalline powder Melting point :357-360 ℃ Purity: ≥ 98.50% Maximum UV absorption wavelength: 374nm Maximum UV absorption wavelength: 434nm |
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| Usage： | |
| The polyester liquid whitening, brightening, and particularly suitable for whitening polyester and cotton blended fabric of polyester and other fibers, plastics can also be used for whitening | |