58449-88-0

Basic information

• Product Name: Fluorescentbrighteningagent199
• Synonyms: Fluorescentbrighteningagent199;Fluorescent Brightener ER-2 C.I. 199:1
• CAS NO: 58449-88-0
• Molecular Formula: C24H16N2
• Molecular Weight: 0
• EINECS: 235-834-6
• Mol File: 58449-88-0.mol
• Article Data: 13

Chemical Properties

• Melting Point: 181-186℃
• Boiling Point: 573.5°C at 760 mmHg
• Flash Point: 274.1°C
• Appearance: /
• Density: 1.18g/cm³
• Vapor Pressure: 3.7E-13mmHg at 25°C
• Refractive Index: 1.66
• Water Solubility: insoluble
• CAS DataBase Reference: Fluorescentbrighteningagent199(CAS DataBase Reference)
• NIST Chemistry Reference: Fluorescentbrighteningagent199(58449-88-0)
• EPA Substance Registry System: Fluorescentbrighteningagent199(58449-88-0)

Safety Data

• Hazardous Substances Data: 58449-88-0(Hazardous Substances Data)

Usage

General Description

Fluorescent Brightening Agent 199, also known as "Fluorescent Whitening Agent" or "Optical Brightening Agent" in the chemical industry is broadly used in detergents, papers, textiles, and plastics to create or enhance the appearance of brightness or whiteness. Although its specific chemical composition and structure isn't commonly accessed, most of these agents work by absorbing ultraviolet light then re-emitting it as blue light, resulting in a whitening or brightening effect. While generally considered safe for use, some individuals may experience sensitivity or allergic reactions to these chemical compounds. Additionally, there's an ongoing environmental concern related to their inability to easily biodegrade and potential aquatic toxicity.

InChI:InChI=1/C24H16N2/c25-17-22-13-11-20(12-14-22)6-5-19-7-9-21(10-8-19)15-16-23-3-1-2-4-24(23)18-26/h1-16H/b6-5+,16-15+

Upstream product

• 623-27-8 terephthalaldehyde, 
• 26104-68-7 (p-cyanobenzyl)triphenylphosphonium bromide 
• 104-85-8 para-methylbenzonitrile 
• 1519-47-7 [p-phenylenebis(methylene)]bis[triphenylphosphonium] dichloride 
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• 915380-21-1 ethoxy(di-(1-methylethyl))-2-[4-[(E)-2-(ethoxydimethylsilyl)ethenyl]phenyl]ethenylsilane 
• 3058-39-7 4-iodobenzonitrile 
• 40817-03-6 p-xylenebis(triphenylphosphonium) dibromide 
• 106-42-3 para-xylene 
• 623-24-5 1,4-bis(bromomethyl)benzene 
• 1552-41-6 diethyl [(4-cyanophenyl)methyl]phosphonate 
• 3435-51-6 4-ethenylbenzonitrile 
• 624-38-4 para-diiodobenzene 
• 73755-13-2 4-[(E)-2-(4-Cyano-phenyl)-vinyl]-benzoyl chloride 

Relevant articles and documents

OPTICAL DATA COMMUNICATION SYSTEM COMPRISING PARA-PHENYLENEVINYLENES AND SPECIFIC PARA-PHENYLENEVINYLENES

An optical data communication system comprising para-phenylenevinylenes, a receiver for an optical data communication system comprising para-phenylenevinylenes, a transmitter for an optical data communication system comprising para-phenylenevinylenes, the use of para- phenylenevinylenes in an optical data communication system, specific para-phenylenevinylenes and their preparation.

Oligo p-Phenylenevinylene Derivatives as Electron Transfer Matrices for UV-MALDI

Phenylenevinylene oligomers (PVs) have outstanding photophysical characteristics for applications in the growing field of organic electronics. Yet, PVs are also versatile molecules, the optical and physicochemical properties of which can be tuned by manipulation of their structure. We report the synthesis, photophysical, and MS characterization of eight PV derivatives with potential value as electron transfer (ET) matrices for UV-MALDI. UV-vis analysis show the presence of strong characteristic absorption bands in the UV region and molar absorptivities at 355 nm similar or higher than those of traditional proton (CHCA) and ET (DCTB) MALDI matrices. Most of the PVs exhibit non-radiative quantum yields (φ) above 0.5, indicating favorable thermal decay. Ionization potential values (IP) for PVs, calculated by the Electron Propagator Theory (EPT), range from 6.88 to 7.96 eV, making these oligomers good candidates as matrices for ET ionization. LDI analysis of PVs shows only the presence of radical cations (M+.) in positive ion mode and absence of clusters, adducts, or protonated species; in addition, M+. threshold energies for PVs are lower than for DCTB. We also tested the performance of four selected PVs as ET MALDI matrices for analytes ranging from porphyrins and phthalocyanines to polyaromatic compounds. Two of the four PVs show S/N enhancement of 1961% to 304% in comparison to LDI, and laser energy thresholds from 0.17 μJ to 0.47 μJ compared to 0.58 μJ for DCTB. The use of PV matrices also results in lower LODs (low fmol range) whereas LDI LODs range from pmol to nmol. [Figure not available: see fulltext.].

Ruthenium-Sulfonamide-Catalyzed Direct Dehydrative Condensation of Benzylic C-H Bonds with Aromatic Aldehydes

The first catalytic dehydrative condensation of the benzylic C-H bonds of toluene and p-xylene with aromatic aldehydes is reported herein. This protocol provides highly atom-economical access to stilbene and p-distyrylbenzene derivatives, whereby water is the sole byproduct. The reaction is based on the deprotonation-functionalization of benzylic C-H bonds through η6-complexation of the arenes, which is realized for the first time using a catalytic amount of a transition metal activator. The key to the success of this method is the use of a sulfonamide anion as a catalyst component, which appears to facilitate not only the deprotonation of the benzylic C-H bonds but also the formation of a C-C bonds via an electrophilic tosylimine intermediate.