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

ChemicalBook > CAS DataBase List > 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene

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

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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.)
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℃
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)

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Safety

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

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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.

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N-Bromosuccinimide Price

Sigma-Aldrich

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

TCI Chemical

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

TCI Chemical

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

Alfa Aesar

Product number: A14928
Product name: 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%
Packaging: 5g
Price: $47
Updated: 2024/03/01

Alfa Aesar

Product number: A14928
Product name: 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%
Packaging: 25g
Price: $116
Updated: 2024/03/01

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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 lubricants^2-4.

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

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

Preparation Products

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

Hubei Yiling biotechnology Co Ltd

Product: 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene 7128-64-5
Price: US $0.00/G/KG
Min. Order: 1G/KG
Purity: 99%
Supply Ability: 100MT
Release date: 2025-02-14

Hebei Zhuanglai Chemical Trading Co.,Ltd

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

Hebei Zhuanglai Chemical Trading Co.,Ltd

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

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

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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-<i>tert-</i>butyl-2-benzoxazolyl)thiophene

Optical Brighter OB

2,5-Bis(5-tert-butylbenzooxazol-2-yl)thiophene

Optical Brightener OB

optical brightenerER-1(OBA199)

optical brightenerOB(OBA184)

TINOPAL CBS-X

UVITEX 2B

UVITEX(R) 2B

UVITEX OB

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

UVITEX

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