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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.)
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 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/

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

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

Shanghai Harvest Chemical Industrial Co., Ltd.
Tel
21-31038972 15721252604
Fax
+86-21-51385350
Email
ammyzuo@harvest-chem.com
Country
China
ProdList
2540
Advantage
64
BEIJING ODYSSEY CHEMICALS CO.,LTD
Tel
10-88018188-315 17502279376
Email
kallisto@bj-odyssey.com
Country
China
ProdList
31
Advantage
58
Finetech Industry Limited
Tel
027-87465837 19945049750
Fax
027-8777-2287
Email
sales@finetechnology-ind.com
Country
China
ProdList
9649
Advantage
58
Tianjin Zhongxin Chemtech Co., Ltd.
Tel
022-66880623
Fax
86(0)22-66880086
Email
sales@tjzxchem.com
Country
China
ProdList
613
Advantage
60
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40228
Advantage
62
INTATRADE GmbH
Tel
+49 3493/605464
Fax
+49 3493/605470
Email
sales@intatrade.de
Country
Germany
ProdList
3572
Advantage
66
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801 18930552037
Fax
86-21-50328109
Email
3bsc@sina.com
Country
China
ProdList
15839
Advantage
69
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30123
Advantage
84
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386
Fax
021-67121385
Email
Sales-CN@TCIchemicals.com
Country
China
ProdList
24529
Advantage
81
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View Lastest Price from 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene manufacturers

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
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
Shandong Deshang Chemical Co., Ltd.
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

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