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
- Molecular Weight:
- 430.56
- MOL File:
- 7128-64-5.mol
- MSDS File:
- SDS
- Modify Date:
- 2024/9/25 20:20:04
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 |
pka | 3.03±0.10(Predicted) |
form | powder |
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) |
SAFETY
Risk and Safety Statements
Symbol(GHS) | GHS07 |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
Signal word | Warning | |||||||||
Hazard statements | H315-H319 | |||||||||
Precautionary statements | P261-P271-P280 | |||||||||
Risk Statements | 36/37/38 | |||||||||
Safety Statements | 24/25 | |||||||||
WGK Germany | 1 | |||||||||
RTECS | DM4888332 | |||||||||
TSCA | Yes | |||||||||
HS Code | 29349990 | |||||||||
Toxicity | LD50 orl-rat: >10 g/kg MVCRB3 2,193,1973 | |||||||||
NFPA 704 |
|
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene price More Price(12)
Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
---|---|---|---|---|---|---|---|
Sigma-Aldrich(India) | 223999 | 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene suitable for scintillation, 99% | 7128-64-5 | 5G | ₹2045.93 | 2022-06-14 | Buy |
TCI Chemicals (India) | B4221 | 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene (purified by sublimation) | 7128-64-5 | 1G | ₹2300 | 2022-05-26 | Buy |
TCI Chemicals (India) | B4221 | 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene (purified by sublimation) | 7128-64-5 | 5G | ₹5700 | 2022-05-26 | Buy |
TCI Chemicals (India) | B1554 | 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene | 7128-64-5 | 5G | ₹2100 | 2022-05-26 | Buy |
ALFA India | ALF-A14928-22 | 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99% | 7128-64-5 | 100g | ₹36444 | 2022-05-26 | Buy |
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Chemical Properties,Uses,Production
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.
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.
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Preparation Products And Raw materials
Raw materials
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chevron_rightPreparation Products
Supplier | Tel | Country | ProdList | Advantage | Inquiry |
---|---|---|---|---|---|
High Grade Industries Pvt Ltd | +91-02240775076 +91-02240775076 | Maharashtra, India | 10 | 58 | Inquiry |
Jupiter Dyes Pvt Ltd | +91-9029076060 +91-9821223938 | Maharashtra, India | 25 | 58 | Inquiry |
CHEMSWORTH | +91-261-2397244 | New Delhi, India | 6707 | 30 | Inquiry |
A.J Chemicals | 91-9810153283 | New Delhi, India | 6124 | 58 | Inquiry |
CLEARSYNTH LABS LTD. | +91-22-45045900 | Hyderabad, India | 6351 | 58 | Inquiry |
TCI Chemicals (India) Pvt. Ltd. | 1800 425 7889 | New Delhi, India | 6778 | 58 | Inquiry |
Otto Chemie Pvt. Ltd. | +91 9820041841 | Mumbai, India | 5873 | 58 | Inquiry |
Alfa Aesar | 1 800 209 7001 | Maharashtra, India | 6913 | 58 | Inquiry |
Triveni chemicals | 08048762458 | New Delhi, India | 6093 | 58 | Inquiry |
Sanchi Organics Private Limited | 08048967289 | Mumbai, India | 22 | 58 | Inquiry |
Supplier | Advantage |
---|---|
High Grade Industries Pvt Ltd | 58 |
Jupiter Dyes Pvt Ltd | 58 |
CHEMSWORTH | 30 |
A.J Chemicals | 58 |
CLEARSYNTH LABS LTD. | 58 |
TCI Chemicals (India) Pvt. Ltd. | 58 |
Otto Chemie Pvt. Ltd. | 58 |
Alfa Aesar | 58 |
Triveni chemicals | 58 |
Sanchi Organics Private Limited | 58 |
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