| Identification | More | [Name]
Fluorescent Brightener 184 | [CAS]
7128-64-5 | [Synonyms]
2,2'-(2,5-THIOPHENEDIYL) BIS [5-TERT-BUTYLBENZOXAZOLE]
2,5-BIS-2(5-TERT-BUTYL-BENZOXALYL)THIOPHENE
2,5-BIS(5-T-BUTYL-2-BENZOXAZOLYL)THIOPHENE
2,5-BIS-(5-T-BUTYLBENZOXAZOLYL-[2-YL])-THIOPHENE
2,5-BIS-(5-TERT-BUTYL-2-BENZOXAZOL-2-YL)THIOPHENE
2,5-BIS(5'-TERT-BUTYL-2-BENZOXAZOL-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-DI(5-TERT-BUTYLBENZOXAZOL-2-YL)THIOPHENE
BBOT
CI FLUORESCENT BRIGHTENER 362
DERIVATIVE OF STILBENE DISULFONIC ACID
LABOTEST-BB LT00053574
TINOPAL CBS-X
TOSLAB 644820
UVITEX 2B
UVITEX OB
UVITEX(R) 2B | [EINECS(EC#)]
230-426-4 | [Molecular Formula]
C26H26N2O2S | [MDL Number]
MFCD00005774 | [Molecular Weight]
430.56 | [MOL File]
7128-64-5.mol |
| Chemical Properties | Back Directory | [Appearance]
light yellow-green crystals | [Melting point ]
199-201 °C(lit.)
| [Boiling point ]
531.2±45.0 °C(Predicted) | [density ]
1.26 | [refractive index ]
1.6360 (estimate) | [Fp ]
>350°C | [storage temp. ]
Keep in dark place,Sealed in dry,Room Temperature | [solubility ]
toluene: soluble50mg/mL | [form ]
powder | [pka]
3.03±0.10(Predicted) | [color ]
Pale Green to Yellow | [Stability:]
Stable. Incompatible with strong oxidizing agents. | [Water Solubility ]
Soluble in acetone and toluene. Insoluble in water. | [ε(extinction coefficient)]
≥47000 at 372-374nm in dioxane | [λmax]
373nm(EtOH)(lit.) | [Merck ]
1014 | [BRN ]
631803 | [InChIKey]
AIXZBGVLNVRQSS-UHFFFAOYSA-N | [LogP]
8.6 at 25℃ | [CAS DataBase Reference]
7128-64-5(CAS DataBase Reference) | [NIST Chemistry Reference]
Benzoxazole, 2,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-(7128-64-5) | [EPA Substance Registry System]
7128-64-5(EPA Substance) |
| Safety Data | Back Directory | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
1
| [RTECS ]
DM4888332
| [TSCA ]
Yes | [HS Code ]
29349990 | [Toxicity]
LD50 orl-rat: >10 g/kg MVCRB3 2,193,1973 |
| Questions And Answer | Back Directory | [Description]
2,5-Bis (5-tert-butyl-2-benzoxazolyl) thiophene (also known as fluorescent brightener 184)1 is used as an optical brightener, which converts UV light into visible light. It is also used as a fluorescent brightener for thermoplastic resins of polyvinyl chloride, acrylic resin, polyester fiber, thermoplastic plastic, ABS, cellulose acetate fiber, paint, coating and printing ink. It is also useful in detecting the presence of thin-film electrical contact lubricants2-4.
| [Sources]
- https://pubchem.ncbi.nlm.nih.gov/compound/bbot#section=Top
- https://www.alfa.com/zh-cn/catalog/A14928/
- http://www.xcolorpigment.com/FLUORESCENT-BRIGHTENER-OB.html
- http://www.offerchems.com/products/catalyst-auxiliary/fluorescent-brightener-184-cas-7128-64-5/
|
| Hazard Information | Back Directory | [Chemical Properties]
light yellow-green crystals | [Uses]
Optical brightener additive in polymers, fibers, films, inks, laquers, and paints. In liquid scintillators. | [Flammability and Explosibility]
Notclassified | [Safety Profile]
Low toxicity by ingestion. Whenheated to decomposition it emits toxic vapors of NOx andSOx. | [Synthesis]
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, also known as fluorescent brightener 0B, is used as a mixing raw material for plastics, coatings, road marking paints, etc., to achieve a whitening effect. In the prior art, the preparation method is to add a mixed solution of trichlorobenzene and toluene into a reaction kettle, then add 0B acid (i.e. thiophene 2,5-dicarboxylic acid), 0B phenol (i.e. p-tert-butyl-o-aminophenol) and boric acid, heat to about 120°C for condensation reaction, evaporate the water generated by the reaction together with the toluene, release the water with a water separator, and return the toluene to the reaction kettle. When the temperature of the reaction material rises to above 180°C, the toluene is evaporated, and the temperature continues to rise for reaction. The water is continuously separated by utilizing the immiscibility of trichlorobenzene and water until the reaction temperature reaches about 230°C. Based on the dehydration phenomenon, the reaction is judged to be complete, and then the material is cooled to below 30°C. The product is crystallized in trichlorobenzene, solid-liquid separation is performed, the trichlorobenzene mother liquor is used for recovery, and the obtained solid material is refined with xylene to obtain 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene. | [Properties and Applications]
|
TEST ITEMS
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SPECIFICATION
|
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APPEARANCE
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LIGHT YELLOW OR MILK WHITE POWDER
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SHADE
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LIGHT YELLOWISH
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METLING POINT
|
201-202
°
C
|
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PURITY
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99% min
|
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FINENESS
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300 mesh min
|
|
SOLUBILITY
|
hardly soluble in water,but soluble in paraffin, mineral oils and ordinary organic solvents.
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