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2,5-BIS(5-TERT-BUTYL-2- BENZOXAZOLYL)THIOPHENE | ||
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PRODUCT IDENTIFICATION |
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CAS NO. |
7128-64-5 |
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| EINECS NO. | 230-426-4 | |
| FORMULA | C26H26N2O2S | |
| MOL WT. | 430.56 | |
| H.S. CODE | ||
| TOXICITY | Oral rat LD50: >10 gm/kg | |
| SYNONYMS | BBOT; | |
| 2,5-Bis(5'-tert-butyl-2-benzoxazol-2-yl)thiophene; Fluorescent Whitening Agent OB; THO; | ||
| 2,2'-(2,5-thiophenediyl) bis (5-tert-butyl)-Benzoxazol; 2,5-Bis(2-benzoxazolyl) Thiophene; 2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene; Fluorescent Brightener 184; | ||
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CLASSIFICATION |
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PHYSICAL AND CHEMICAL PROPERTIES |
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| PHYSICAL STATE | Bright Yellow powder | |
| MELTING POINT | 202 -203 C | |
| BOILING POINT | ||
| SPECIFIC GRAVITY | ||
| SOLUBILITY IN WATER | ||
| AUTOIGNITION | ||
| pH | ||
| VAPOR DENSITY | ||
| NFPA RATINGS | Health: 1; Flammability: 0; Reactivity: 0 | |
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REFRACTIVE INDEX |
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| FLASH POINT |
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| STABILITY | Stable under ordinary conditions | |
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APPLICATIONS |
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Fluorescent Whitening Agents (also called optical brightener) absorb high energy
radiation in the ultraviolet to violet region (330nm-380nm) on the part of
characteristic molecules and emit lower energy radiation in blue region in
visible spectrum (400nm-450nm), which yields the counteracting the yellowing
appearance. FWA should be transparent on the substrate and should not absorb the
visible region of the spectrum. Many FWAs contain the structure of stilbene.
Stilbene is an unsaturated hydrocarbon with the formula C6H5CH=CHC6H5. Other
nucleus of FWAs are coumarin, imidazole, 1,3-diphenyl-2-pyrazolin, naphtalimid,
benzoxazole and heteroaromatics. FWAs are used in thermoplastics, detergents,
plastic films, fibers, papers, adhesives and leathers to enhance the appearance.
2,5-Bis(2-benzoxazolyl) thiophene is used as a fluorescent brightener for thermo plastic resins of PVC, PE, PP, PS, ABS, SAN SB, CA, PA, PMMA, acrylic resin, polyester fiber, paint, coating and printing ink. This fluorescent whitening agent is equivalent to Uvitex OB made in Ciba |
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| SALES SPECIFICATION | ||
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APPEARANCE |
Bright Yellow powder | |
| PURITY |
98.0% min | |
| MELTING POINT |
196 - 203 C | |
| DECOMPOSITION |
> 220 C | |
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WAVE LENGTH |
375nm max in EtOH | |
| VOLATILES |
0.5% max | |
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ASH |
0.1% max | |
| PARTICLE SIZE | 200 mesh | |
| TRANSPORTATION | ||
| PACKING | 25kgs in fiber drum | |
| HAZARD CLASS | Not regulated | |
| UN NO. |
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| OTHER INFORMATION | ||
| Hazard Symbols: n/a, Risk Phrases: n/a, Safety Phrases: 24/25-28A-37-45 | ||
