2866-43-5

Basic information

• Product Name: Fluorescent Brightener 185
• Synonyms: 2,2'-(2,5-thiophenediyl)bis-benzoxazole;2,5-di(benzoxazol-2-yl)thiophene;2,5-Bis(2-benzoxazolyl)thiophene;fluorescent brightener 185;C.I. Fluorescent Brightener 172;c.i. 515240;2,2'-thiophene-2,5-diylbis(benzoxazole);Benzoxazole, 2,2-(2,5-thiophenediyl)bis-
• CAS NO: 2866-43-5
• Molecular Formula: C₁₈H₁₀N₂O₂S
• Molecular Weight: 318.35
• EINECS: 220-685-1
• Product Categories: Industrial/Fine Chemicals
• Mol File: 2866-43-5.mol
• Article Data: 10

Chemical Properties

• Melting Point: 216-220°C
• Boiling Point: 466.4 °C at 760 mmHg
• Flash Point: 235.9 °C
• Appearance: light yellow crystalline or bright blue fluorescence powder
• Density: 1.385
• Vapor Pressure: 1.98E-08mmHg at 25°C
• Refractive Index: 1.6000 (estimate)
• PKA: 1.27±0.10(Predicted)
• Water Solubility: 9.551ug/L(25 oC)
• CAS DataBase Reference: Fluorescent Brightener 185(CAS DataBase Reference)
• NIST Chemistry Reference: Fluorescent Brightener 185(2866-43-5)
• EPA Substance Registry System: Fluorescent Brightener 185(2866-43-5)

Safety Data

• Hazardous Substances Data: 2866-43-5(Hazardous Substances Data)

Usage

General Description

Fluorescent Brightener 185, also known as C.I. 11324, is a fluorescent whitening agent used in a variety of consumer products such as laundry detergents, paper, and plastics to improve the appearance of textiles and paper by making them appear brighter and whiter. It works by absorbing invisible ultraviolet light and emitting visible blue light, effectively masking the yellowish tint of materials. Fluorescent Brightener 185 is considered non-toxic and safe for use in consumer products when used within the recommended limits, and it is often included in formulations to enhance the brightness and whiteness of treated materials without affecting their color or durability.

InChI:InChI=1/C18H10N2O2S/c1-3-7-13-11(5-1)19-17(21-13)15-9-10-16(23-15)18-20-12-6-2-4-8-14(12)22-18/h1-10H

Upstream product

• 273-53-0 benzoxazole 
• 3141-27-3 2,5-dibromothiophen 
• 625-88-7 2,5-diiodothiophene 
• 3172-52-9 2,5-diclorothiophene 
• 932-95-6 2,5-thiophenedicarboxaldehyde 
• 88-75-5 2-hydroxynitrobenzene 
• 4282-31-9 Thiophene-2,5-dicarboxylic acid 
• 95-55-6 2-amino-phenol 
• 3857-36-1 thiophene-2,5-dicarbonyl dichloride 

Relevant articles and documents

Stable Pd(0) Complexes with Ferrocene Bisphosphanes Bearing Phosphatrioxaadamantyl Substituents Efficiently Catalyze Selective C-H Arylation of Benzoxazoles by Aryl Chlorides

Versatile applications and unique performance of 1,1’-bis(diphenylphosphanyl)ferrocene (dppf) in coordination chemistry and catalysis prompted the search for its analogs. This contribution describes the synthesis of the first donor-unsymmetric dppf congeners bearing bulky and rigid 1,3,5,7-tetramethyl-2,4,6-trioxa-8-phosphaadamantyl (CgP) donor groups, viz. Ph2PfcPCg (1) and Ph2PfcCH2PCg (2; fc=ferrocene-1,1’-diyl). Bis-phosphanes 1 and 2 were converted into air-stable Pd(0) complexes, [Pd(ma)(L^L)] (L^L=1 and 2; ma=maleic anhydride). Together with [Pd(ma)(dppf)], these complexes were applied as catalysts in Pd-catalyzed C?H arylation of benzoxazoles with aryl chlorides in n-butanol as an environmentally benign solvent. Among all catalysts tested in this study, complex [Pd(ma)(2)] performed the best, providing a high-yield and selective synthesis of 2-arylbenzoxazoles from a range of the generally less reactive chloroarenes at low catalyst loading (typically 1 mol.%). Under similar conditions, the structurally related heterocycles (e. g., 1-methylbenzimidazole and benzothiazole) did not react.

BENZOXAZOLE DERIVATIVES AND FLUORESCENT MATERIAL COMPRISING THE SAME

The present invention relates to a benzoxazole derivative represented by structural formula 1. Accordingly, it is possible to provide a fluorescent material which has a significantly improved fluorescence yield, has excellent dyeability and dispersibility, minimizes environmental pollution by reducing the amount of use, and also can improve economic efficiency.COPYRIGHT KIPO 2020

Direct multiple C-H bond arylation reaction of heteroarenes catalyzed by cationic palladium complex bearing 1,10-phenanthroline

A cationic palladium complex bearing 1,10-phenanthroline ligand is found to catalyze direct C-H arylation reactions of heteroarenes with aryl iodides to give mono-, di-, or tri-arylated products selectively. The Royal Society of Chemistry.