2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
Description Sources- Product Name
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
- CAS No.
- 7128-64-5
- Chemical Name
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
- Synonyms
- Optical Brightener OB;UVITEX OB;TINOPAL CBS-X;2,5-BIS(5-TERT-BUTYL-BENZOXAZOL-2-YL)THIOPHENE;UVITEX;Optical Brightening Agent;2,5-BIS(5-TERT-BUTYLBENZOXAZOYL)-2-THIOPHENE;BBOT;B-184;bbot150
- CBNumber
- CB3434574
- Molecular Formula
- C26H26N2O2S
- Formula Weight
- 430.56
- MOL File
- 7128-64-5.mol
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Property
- Melting point:
- 199-201 °C(lit.)
- Boiling point:
- 531.2±45.0 °C(Predicted)
- Density
- 1.26
- refractive index
- 1.6360 (estimate)
- Flash point:
- >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
- Water Solubility
- Soluble in acetone and toluene. Insoluble in water.
- λmax
- 373nm(EtOH)(lit.)
- Merck
- 14,1014
- BRN
- 631803
- Stability:
- Stable. Incompatible with strong oxidizing agents.
- 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
- 2,2'-(2,5-Thiophenediyl)bis[5-tert-butylbenzoxazole] (7128-64-5)
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H315Causes skin irritation
H319Causes serious eye irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
N-Bromosuccinimide Price
- Product number
- 223999
- Product name
- 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene
- Purity
- suitable for scintillation, 99%
- Packaging
- 5g
- Price
- $56.9
- Updated
- 2024/03/01
- Product number
- B1554
- Product name
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
- Purity
- >98.0%(HPLC)(N)
- Packaging
- 5g
- Price
- $36
- Updated
- 2024/03/01
- Product number
- B1554
- Product name
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
- Purity
- >98.0%(HPLC)(N)
- Packaging
- 25g
- Price
- $76
- Updated
- 2024/03/01
- Product number
- A14928
- Product name
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%
- Packaging
- 5g
- Price
- $47
- Updated
- 2024/03/01
- Product number
- A14928
- Product name
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%
- Packaging
- 25g
- Price
- $116
- Updated
- 2024/03/01
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Chemical Properties,Usage,Production
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/
Chemical Properties
light yellow-green crystals
Uses
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene 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, paint, coating and printing ink. It is also useful in detecting the presence of thin-film electrical contact lubricants.
Uses
Optical brightener additive in polymers, fibers, films, inks, laquers, and paints. In liquid scintillators.
Flammability and Explosibility
Not classified
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 |
SPECIFICATION |
|
APPEARANCE |
LIGHT YELLOW OR MILK WHITE POWDER |
|
SHADE |
LIGHT YELLOWISH |
|
METLING POINT |
201-202 ° C |
|
PURITY |
99% min |
|
FINENESS |
300 mesh min |
|
SOLUBILITY |
hardly soluble in water,but soluble in paraffin, mineral oils and ordinary organic solvents. |
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Preparation Products And Raw materials
Raw materials
Preparation Products
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Suppliers
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View Lastest Price from 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene manufacturers
- Product
- Sodium hydroxyethyl sulfonate 7128-64-5
- Price
- US $60.00/kg
- Min. Order
- 1kg
- Purity
- 99
- Supply Ability
- 5000
- Release date
- 2024-05-15
- Product
- OPTICAL BRIGHTENER TRUELICHT OB 7128-64-5
- Price
- US $70.00/kg
- Min. Order
- 1kg
- Purity
- 99
- Supply Ability
- 5000
- Release date
- 2024-05-23
- Product
- 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene 7128-64-5
- Price
- US $10.00-7.00/kg
- Min. Order
- 1kg
- Purity
- 99.99%
- Supply Ability
- 10 tons
- Release date
- 2024-06-13