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7128-64-5

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  • Factory Price Fluorescent whitening 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene 7128-64-5 Manufacturer

    Cas No: 7128-64-5

  • USD $ 0.1-0.1 / Gram

  • 1 Gram

  • 100 Metric Ton/Year

  • Xi'an Xszo Chem Co., Ltd.
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7128-64-5 Usage

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

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

Different sources of media describe the Uses of 7128-64-5 differently. You can refer to the following data:
1. Optical brightener additive in polymers, fibers, films, inks, laquers, and paints. In liquid scintillators.
2. 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.

Flammability and Explosibility

Notclassified

Safety Profile

Low toxicity by ingestion. Whenheated to decomposition it emits toxic vapors of NOx andSOx.

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.

TEST ITEMS

SPECIFICATION

APPEARANCE

LIGHT YELLOW OR MILK WHITE POWDER

SHADE

LIGHT YELLOWISH

METLING POINT

201-202 ° C

SOLUBILITY

hardly soluble in water,but soluble in paraffin, mineral oils and ordinary organic solvents.

Check Digit Verification of cas no

The CAS Registry Mumber 7128-64-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,2 and 8 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 7128-64:
(6*7)+(5*1)+(4*2)+(3*8)+(2*6)+(1*4)=95
95 % 10 = 5
So 7128-64-5 is a valid CAS Registry Number.
InChI:InChI=1/C26H26N2O2S/c1-25(2,3)15-7-9-19-17(13-15)27-23(29-19)21-11-12-22(31-21)24-28-18-14-16(26(4,5)6)8-10-20(18)30-24/h7-14H,1-6H3

7128-64-5 Well-known Company Product Price

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  • (Code)Product description
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  • Detail
  • Alfa Aesar

  • (A14928)  2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%   

  • 7128-64-5

  • 5g

  • 348.0CNY

  • Detail
  • Alfa Aesar

  • (A14928)  2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%   

  • 7128-64-5

  • 25g

  • 1480.0CNY

  • Detail
  • Alfa Aesar

  • (A14928)  2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene, 99%   

  • 7128-64-5

  • 100g

  • 4851.0CNY

  • Detail
  • Sigma-Aldrich

  • (223999)  2,5-Bis(5-tert-butyl-benzoxazol-2-yl)thiophene  suitable for scintillation, 99%

  • 7128-64-5

  • 223999-5G

  • 415.35CNY

  • Detail

7128-64-5SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name Fluorescent Brightener 184

1.2 Other means of identification

Product number -
Other names B-184

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:7128-64-5 SDS

7128-64-5Synthetic route

Thiophene-2,5-dicarboxylic acid
4282-31-9

Thiophene-2,5-dicarboxylic acid

2-amino-4-tert-butylphenol
1199-46-8

2-amino-4-tert-butylphenol

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
With boric acid In toluene at 170 - 240℃; Solvent; Temperature; Inert atmosphere;98.7%
Thiophene-2,5-dicarboxylic acid bis-[(5-tert-butyl-2-hydroxy-phenyl)-amide]

Thiophene-2,5-dicarboxylic acid bis-[(5-tert-butyl-2-hydroxy-phenyl)-amide]

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
at 200℃; for 3h; Yield given;
thiophene-2,5-dicarbonyl dichloride
3857-36-1

thiophene-2,5-dicarbonyl dichloride

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: Heating
2: 3 h / 200 °C
View Scheme
Thiophene-2,5-dicarboxylic acid
4282-31-9

Thiophene-2,5-dicarboxylic acid

Uvitex OB
7128-64-5

Uvitex OB

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: N-methyl-2-pyrrolidone, thionyl chloride
2: Heating
3: 3 h / 200 °C
View Scheme
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,2,4-trihydroxy-9,10-anthraquinone
81-54-9

1,2,4-trihydroxy-9,10-anthraquinone

Uvitex OB
7128-64-5

Uvitex OB

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,2,4-trihydroxy-9,10-anthraquinone(-2H))2]

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,2,4-trihydroxy-9,10-anthraquinone(-2H))2]

Conditions
ConditionsYield
In 1,2,5-trimethyl-benzene under reflux;99%
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,4-dihydroxy-9,10-anthracenedione
81-64-1

1,4-dihydroxy-9,10-anthracenedione

Uvitex OB
7128-64-5

Uvitex OB

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,4-dihydroxy-9,10-anthraquinone(-2H))2]
918153-35-2

[(Re(CO)3)4(2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene)2(1,4-dihydroxy-9,10-anthraquinone(-2H))2]

Conditions
ConditionsYield
In 1,2,5-trimethyl-benzene under reflux;99%
iron (III) bromide

iron (III) bromide

Uvitex OB
7128-64-5

Uvitex OB

(2,5-bis-(5-tert-butyl-2-benzoxazolyl)thiophene)FeBr3

(2,5-bis-(5-tert-butyl-2-benzoxazolyl)thiophene)FeBr3

Conditions
ConditionsYield
In tetrahydrofuran Stirring for several h; Under Ar or N2;98%
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,2,4-trihydroxy-9,10-anthraquinone
81-54-9

1,2,4-trihydroxy-9,10-anthraquinone

Uvitex OB
7128-64-5

Uvitex OB

C76H33N4O26Re4S2

C76H33N4O26Re4S2

Conditions
ConditionsYield
In 1,3,5-trimethyl-benzene Heating / reflux;
decacarbonyldirhenium(0)
14285-68-8

decacarbonyldirhenium(0)

1,4-dihydroxy-9,10-anthracenedione
81-64-1

1,4-dihydroxy-9,10-anthracenedione

Uvitex OB
7128-64-5

Uvitex OB

C76H33N4O24Re4S2

C76H33N4O24Re4S2

Conditions
ConditionsYield
In 1,3,5-trimethyl-benzene Heating / reflux;

7128-64-5Downstream Products

7128-64-5Relevant articles and documents

Metal-Free Oxidative Condensation of Catechols, Aldehydes and NH4OAc towards Benzoxazoles

Dong, Jianyu,Geng, Furong,Su, Lebin,Wu, Shaofeng,Yin, Shuang-Feng,Zhou, Dan,Zhou, Yongbo

supporting information, p. 3607 - 3614 (2021/07/28)

Benzoxazoles extensively exist in biologically active compounds, natural products, pharmaceuticals and functional materials. Thus, facile and green synthesis of such valuable compounds from easily available substrates will make a contribution to drug, material, and fine chemistry. A method for the synthesis of benzoxazoles from catechols, aldehydes and ammonium acetate is developed using NaIO4 as oxidant under metal- and additive-free conditions. A broad range of benzoxazoles including some fluorescent whitening agents, JTP-426467 and tafamidis analogues are synthesized in 56–95% yields with outstanding functional group tolerance. Mechanistic investigations suggest that an interesting o-iminocyclohexa-diene alcohol intermediate is involved in the reaction. These salient features of the protocol make it an alternative for the synthesis of benzoxazoles. (Figure presented.).

Process for preparing particles which have a hydrophilic core coated with a hydrophobic polymeric layer

-

, (2016/06/01)

This method of preparing particles having a hydrophilic core coated with a hydrophilic core coated with a hydrophobic polymeric layer includes the steps of: preparing an aqueous phase comprising at least one hydrophilic optical brightener or colorant; preparing an organic phase including at least one hydrophobic polymer; forming a water-in-oil inverse emulsion by adding the aqueous phase into the organic phase; forming the particles by thermal quenching of the emulsion; and isolating the particles thus obtained.

Eine einfache Methode zur Herstellung von Benzoxazolen

Seha, Zdenek,Weis, Claus D

, p. 413 - 419 (2007/10/02)

The preparation of benzoxazoles by a facile one-pot reaction is reported.The reaction of carboxylic acids with 2-chloro-N-methyl-Δ1-pyrrolinium chloride in an excess of N-methyl-2-pyrrolidone afforded carboxylic acid chlorides which were converted subsequently to their 2-hydroxyanilides by addition of 2-aminophenols.Cyclization of the 2-hydroxy-anilides at elevated temperatures furnished the benzoxazoles in high yield and purity.

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