2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene CAS 7128-64-5

Introduction：Basic information about 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene CAS 7128-64-5, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

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

• Product Name: 2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
• Synonyms: 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
• CAS: 7128-64-5
• MF: C26H26N2O2S
• MW: 430.56
• EINECS: 230-426-4
• Product Categories: brightener;pigments;Electroluminescence;Functional Materials;Organics;Industrial/Fine Chemicals
• Mol File: 7128-64-5.mol

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

• Melting point: 199-201 °C(lit.)
• Boiling point: 531.2±45.0 °C(Predicted)
• density: 1.26
• refractive index: 1.6360 (estimate)
• Fp: >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.
• ε(extinction coefficient): ≥47000 at 372-374nm in dioxane
• λmax: 373nm(EtOH)(lit.)
• Merck: 14,1014
• BRN: 631803
• Stability: Stable. Incompatible with strong oxidizing agents.
• Major Application: diagnostic assay manufacturing hematology histology
• Cosmetics Ingredients Functions: SKIN CONDITIONING - MISCELLANEOUS
• InChI: 1S/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
• InChIKey: AIXZBGVLNVRQSS-UHFFFAOYSA-N
• SMILES: CC(C)(C)c1ccc2oc(nc2c1)-c3ccc(s3)-c4nc5cc(ccc5o4)C(C)(C)C
• 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 Information

• Risk Statements: 36/37/38
• Safety Statements: 24/25
• WGK Germany: 1
• RTECS: DM4888332
• TSCA: TSCA listed
• HS Code: 29349990
• Storage Class: 11 - Combustible Solids
• Toxicity: LD50 orl-rat: >10 g/kg MVCRB3 2,193,1973

2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene Usage And Synthesis

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

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

Optical brightener additive in polymers, fibers, films, inks, laquers, and paints. In liquid scintillators.

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.

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