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

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Structure
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
MDL Number:
MFCD00005774
MOL File:
7128-64-5.mol
MSDS File:
SDS
Last updated:2025-09-24 14:33:23
Product description Number Pack Size Price
2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene suitable for scintillation, 99% 223999 5g $55.93
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene >98.0%(HPLC)(N) B1554 5g $36
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene >98.0%(HPLC)(N) B1554 25g $76
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene (purified by sublimation) >99.0%(HPLC)(N) B4221 1g $122
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene (purified by sublimation) >99.0%(HPLC)(N) B4221 5g $382
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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
Appearance Pale green to yellow solid
Water Solubility Soluble in acetone and toluene. Insoluble in water.
λmax 373nm(EtOH)(lit.)
ε(extinction coefficient) ≥47000 at 372-374nm in dioxane
Merck 14,1014
BRN 631803
Stability Stable. Incompatible with strong oxidizing agents.
InChIKey AIXZBGVLNVRQSS-UHFFFAOYSA-N
LogP 8.6 at 25℃
Indirect Additives used in Food Contact Substances 2,2'-(2,5-THIOPHENEDIYL)-BIS (5-TERT-BUTYLBENZOXAZOLE)
FDA 21 CFR 178.3297
CAS DataBase Reference 7128-64-5(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII W7UR9129GP
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)
UNSPSC Code 12171500
NACRES NA.47

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
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(45)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 223999 2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene suitable for scintillation, 99% 7128-64-5 5g $55.93 2025-07-31 Buy
TCI Chemical B1554 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene >98.0%(HPLC)(N) 7128-64-5 5g $36 2025-07-31 Buy
TCI Chemical B1554 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene >98.0%(HPLC)(N) 7128-64-5 25g $76 2025-07-31 Buy
TCI Chemical B4221 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene (purified by sublimation) >99.0%(HPLC)(N) 7128-64-5 1g $122 2025-07-31 Buy
TCI Chemical B4221 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene (purified by sublimation) >99.0%(HPLC)(N) 7128-64-5 5g $382 2025-07-31 Buy
Product number Packaging Price Buy
223999 5g $55.93 Buy
B1554 5g $36 Buy
B1554 25g $76 Buy
B4221 1g $122 Buy
B4221 5g $382 Buy

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

  1. https://pubchem.ncbi.nlm.nih.gov/compound/bbot#section=Top
  2. https://www.alfa.com/zh-cn/catalog/A14928/
  3. http://www.xcolorpigment.com/FLUORESCENT-BRIGHTENER-OB.html
  4. http://www.offerchems.com/products/catalyst-auxiliary/fluorescent-brightener-184-cas-7128-64-5/

Description

2,5-Bis(5-tert-butylbenzooxazol-2-yl)thiophene is a fluorescent dye used to prepare stable fluorescent silica nanoparticles as DNA carrier.

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 synthesis

4282-31-9
7128-64-5
Synthesis of 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene from 2,5-Thiophenedicarboxylic acid

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Preparation Products And Raw materials

Raw materials

Adipic acid Glyoxal Chloroform Sodium Methoxide 2-Amino-4-tert-butylphenol
Sodium disulfide Dichloromethane Thionyl chloride 2,5-Thiophenedicarboxylic acid

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Preparation Products

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

Global( 506)Suppliers
Supplier Tel Email Country ProdList Advantage
career henan chemical co 		+86-0371-86658258 +8613203830695 sales@coreychem.com China 29845 58
Winchem industrial co limited
+8613003762012 info@win-chemical.com China 300 58
Qingdao Truelight functional Material Technology Co., Ltd.
+86-13573844393 songjames@truelightchem.com China 221 58
Hebei Chuanghai Biotechnology Co., Ltd 		+8615350571055 Sibel@chuanghaibio.com China 8768 58
Hebei Chuanghai Biotechnology Co,.LTD 		+86-13131129325 sales1@chuanghaibio.com China 5249 58
Hebei Zhuanglai Chemical Trading Co.,Ltd 		+8613343047651 admin@zlchemi.com China 3692 58
Anhuyan (Hainan) Biotechnology Co., LTD 		+86-18163349544; +8618163349544 mollylucking@foxmail.com China 3000 58
Shandong Deshang Chemical Co., Ltd. 		+86-0531-8875-2665 +8613153039501 info@deshangchem.com China 661 58
Capot Chemical Co.,Ltd. 		+86-（0）57185586718; +8613336195806 sales@capot.com China 29735 60
Shanghai Daken Advanced Materials Co.,Ltd 		+86-2158073036 info@dakenam.com China 13595 58
Supplier Advantage
career henan chemical co 		58
Winchem industrial co limited
58
Qingdao Truelight functional Material Technology Co., Ltd.
58
Hebei Chuanghai Biotechnology Co., Ltd 		58
Hebei Chuanghai Biotechnology Co,.LTD 		58
Hebei Zhuanglai Chemical Trading Co.,Ltd 		58
Anhuyan (Hainan) Biotechnology Co., LTD 		58
Shandong Deshang Chemical Co., Ltd. 		58
Capot Chemical Co.,Ltd. 		60
Shanghai Daken Advanced Materials Co.,Ltd 		58

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View Lastest Price from 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene pictures 2025-12-12 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
7128-64-5
 0.99 RongNa Biotechnology Co.,Ltd
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene pictures 2025-12-12 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
7128-64-5
 US $0.00 / G/KG 1G/KG 99% 100MT Anhuyan (Hainan) Biotechnology Co., LTD
2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene pictures 2025-12-11 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
7128-64-5
 US $1.00 / kg 1kg 99% 10mt Hebei Chuanghai Biotechnology Co., Ltd

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

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene(7128-64-5)MS2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene(7128-64-5)1HNMR2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene(7128-64-5)IR12,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene(7128-64-5)IR2

7128-64-5(2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene)Related Search:

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bbot150 Benzoxazole, 2,2'-(2,5-thiophenediyl)bis(5-tert-butyl- Benzoxazole, 2,2'-(2,5-thiophenediyl)bis*5-(1,1-dimethylethyl)- Benzoxazole, 2,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)- LABOTEST-BB LT00053574 CI FLUORESCENT BRIGHTENER 362 DERIVATIVE OF STILBENE DISULFONIC ACID BBOT 2,5-DI(5-TERT-BUTYLBENZOXAZOL-2-YL)THIOPHENE 2,5-BIS-2(5-TERT-BUTYL-BENZOXALYL)THIOPHENE 2,5-BIS(5'-TERT-BUTYL-2'-BENZOXAZOLYL)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-T-BUTYLBENZOXAZOLYL-[2-YL])-THIOPHENE 2,5-BIS(5-T-BUTYL-2-BENZOXAZOLYL)THIOPHENE 2,2'-(2,5-THIOPHENEDIYL) BIS [5-TERT-BUTYLBENZOXAZOLE] 2,5-thiophenediylbis(5-tert-butyl-1,3-benzoxazole) Optical Brightening Agent OB C. I. 184 Fluorescent whitening agent OB BIS(T-BUTYL BENZOXAZOLYL) THIOPHENE 2 5-BIS(5-TERT-BUTYL-2-BENZOXAZOLYL)THI& 2,5-BIS(5-TERT-BUTYL-2-BENZOXAZOLYL)THIO -PHENE, 99%, SCINTILLATION GRADE OptiblancPL 2,5-BIS-(5'-TERT-BUTYL-2-BENZOXAZOL-2-YL)THIOPHENE (BBOT) BBOT, scintillation grade OpticalBrighteningAgentOBC.I. 2,2'-(Thien-2,5-diyl)bis[5-(tert-butyl)-1,3-benzoxazole], 2,5-Bis[5-(tert-butyl)benzo[d]oxazol-2-yl]thiophene, BBOT 2,5-Bis[5-(tert-butyl)-1,3-benzoxazol-2-yl]thiophene 2,2-(2,5-two phenylthio)-[5-(1,1- twoMethyl ethyl)]benzoxazoles 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene,99% 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Optical Brighter OB 2,5-Bis(5-tert-butylbenzooxazol-2-yl)thiophene UVITEX 2B UVITEX(R) 2B TOSLAB 644820 2,2’-(2,5-thiophenediyl)bis(5-(1,1-dimethylethyl)-benzoxazol 2,2’-(2,5-thiophenediyl)bis(5-tert-butyl-benzoxazol 2,2’-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-benzoxazol 2,2’-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-Benzoxazole 2,5-Thiophendiylbis(5-tert.-butyl-1,3-benzoxazol) 1,4-BIS(BENZOXAZOLE-2-YL)NAPHTHALENE 2,5-Bis(5-t-butylbenzoxazol-2-yl)thiophene 2,5-Bis-2(5-tert-butylbenzoxazolyl)thiophene 5-tert-Butyl-2-[5-(5-tert-butyl-1,3-benzoxazol-2-yl)-2-thienyl]-1,3-benzoxazole EUTEX OB-RC EUTEX-OB RC EXTRA FLUORESCENTBRIGHTENEROB(2,5-BIS(5-TERT-BUTYL-2-BENZOXAOLYL)THIOPHENE) Fluorescent Brightener 184 2，5-di[5'-tertutyl-benzoxa-zolyl-2']-thiophene 5-tert-Butyl-2-[5-(5-tert-butyl-1,3-benzoxazol-2-yl)thiophen-2-yl]-1,3-benzoxazole 2,2'-(Thiophene-2,5-diyl)bis(5-tert-butylbenzoxazole) B-184 Fluorescent Brighten OPTICAL BRIGHTENER 184 2,5-bis thiophene BBOT, scintillation grade 5GR FBA 184