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2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Structure
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

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Properties

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
0
1 0

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
Product number Packaging Price Buy
223999 5G ₹2045.93 Buy
B4221 1G ₹2300 Buy
B4221 5G ₹5700 Buy
B1554 5G ₹2100 Buy
ALF-A14928-22 100g ₹36444 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

Global( 468)Suppliers
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

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