CAS number：7128-64-5
molecular formula：C26H26N2O2S
molecular weight：430.56
EINECS number：230-426-4

English synonyms

bbot150;Benzoxazole,2,2'-(2,5-thiophenediyl)bis(5-tert-butyl-;Benzoxazole,2,2'-(2,5-thiophenediyl)bis*5-(1,1-dimethylethyl)-;Benzoxazole,2Chemicalbook,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-;LABOTEST-BBLT00053574;CIFLUORESCENTBRIGHTENER362;DERIVATIVEOFSTILBENEDISULFONICACID;BBOT

Related categories

Textile dyeing and finishing auxiliaries; chemical auxiliaries; thiophenes; heterocyclic building blocks; fluorescent whitening agents; general reagents; oxazoles; textile dyeing and printing auxiliaries;brightener;Chemical Reagents; Intermediates; Standard Substances - Others; Organic Chemicals; Biochemical Reagents - Surfactants; Chemical Raw Materials; Chemical Raw Materials; Pharmaceutical Impurities and Intermediates; Biochemical Reagents - Amino Acids; Other Raw Materials; Brightener OB; Organic Chemical Raw Materials ;Fluoride;General Biochemical Reagent-Surfactant;Biochemical Reagent;Industrial/FineChemicals;Organics;Electroluminescence;FunctionalMaterials;pigments

Introduction

This product is yellow-green powder. The melting point is 200～201℃, and the decomposition temperature is higher than 220℃. Insoluble in water, soluble in alkanes, fats, mineral oils, waxes and common organic solvents. Solubility/(g/100ml): methanol 0.05; acetone 0 Chemicalbook.5; toluene 5.3; carbon tetrachloride 5.9; tetrahydrofuran 5.5; DMF 0.8; chlorobenzene 10.2; cyclohexane 3.3; xylene 5.5; Octyl ester 0.7; water 0.01. The maximum absorption wavelength is 374nm.

 Chemical properties

This product is yellow-green powder. The melting point is 200～201℃, and the decomposition temperature is higher than 220℃. Insoluble in water, soluble in alkanes, fats, mineral oils, waxes and common organic solvents. Solubility/(g/100ml): methanol 0.05; acetone 0 Chemicalbook.5; toluene 5.3; carbon tetrachloride 5.9; tetrahydrofuran 5.5; DMF 0.8; chlorobenzene 10.2; cyclohexane 3.3; xylene 5.5; Octyl ester 0.7; water 0.01. The maximum absorption wavelength is 374nm.

Use

●  This product is used for whitening treatment of polyvinyl chloride, polystyrene, ABS resin, polyolefin and polyester, and also used for whitening acetate fiber, polymethyl methacrylate, and foam artificial leather. Also used in varnishes, paints, UV-curable coatings, printing inks, fats, oils, packaging materials. It can be used as anti-counterfeiting mark when applied in printing ink. In photography, it can be used to improve the whiteness of the non-image area of the photo, and the photo can be converted into fluorescence when exposed to ultraviolet light. Produces a brightening and brightening effect.

●  Mainly used for whitening of PVC, PSChemicalbook, PE, PP, ABS and other plastics and acetate fibers, paints, coatings, inks, etc.

●  It is mainly used for the whitening of synthetic fibers and plastic products, and it has obvious effect of increasing the beauty of colored plastic products. It is also used for PE, PP, PVC, PS, ABS, etc.

●  Biochemical research

●  Liquid Scintillation Counting Reactants 2,2'-(2,5-thiophenediyl)bis[5-(1,1-dimethylethyl)-Benzoxazole

Production method

120kg of chlorobenzene was put into the reactor, and 21kg of o-amino-p-tert-butylphenol was added. 19 kg of chloromethyliminoethyl ether hydrochloride was slowly added dropwise with stirring at room temperature. After dripping, the temperature was raised and refluxed. The reaction is carried out for 3 to 4 hours. Chloroform was recovered. About 24 kg of brown oil were obtained. Add 200kg of water to the vulcanization kettle, then add 45kg of sodium disulfide and 0.5kg of PTC (as a phase transfer catalyst). After stirring and dissolving, it was cooled to 10° C., the dichloromethane solution of the above reactant was added dropwise, and the mixture was stirred by Chemicalbook for 10 h, left to stand for stratification, and the organic layer was washed with water. Dichloromethane was recovered and about 23 kg of yellow solid were obtained. This was dissolved in 100 kg of dimethyl sulfoxide and 2.8 kg of glyoxal were added. Under nitrogen protection, the mixture was cooled to 0 °C with stirring, and 20 kg of 30% sodium methoxide methanol solution was added dropwise. The reaction is carried out for 5 to 6 hours. The material was acidified with 1:2 dilute hydrochloric acid to pH 5-6, methanol was evaporated under reduced pressure, cooled and filtered, the filter cake was washed with water until neutral, and dried. Recrystallize with ethyl acetate to obtain fluorescent whitening agent OB.

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