Description

Benzoxazolium,5-Chloro-2-[2-[(5-Chloro-3-Ethyl-2(3H)-Benzoxazolylidene)Methyl]-3-(4-Sulfobutyl)-, Inner Salt is a specialized zwitterionic dye intermediate belonging to the benzoxazolium class, characterized by its inner salt structure which enhances its solubility and reactivity profile. This compound matters for its role as a key precursor in the synthesis of advanced functional dyes, particularly near-infrared (NIR) absorbing and fluorescent markers. Industrial users in the specialty chemicals, optical materials, and biomedical research sectors require this high-purity intermediate to develop products for imaging, sensing, and high-tech coatings.

Application

• Synthesis of NIR (Near-Infrared) Absorbing Dyes: A critical building block for dyes used in optical filters, laser protection materials, and security inks.
• Fluorescent Probe and Marker Production: Used in creating sensitive fluorescent tags for bio-imaging, cell tracking, and diagnostic assays.
• Functional Polymer and Resin Modification: Imparts specific light-absorption or emission properties to polymers for advanced optical applications.
• Photographic and Imaging Sensitizers: Serves as a sensitizing agent in specialized photographic emulsions and digital imaging materials.
• Research & Development of Organic Electronic Materials: Investigated for use in organic light-emitting diodes (OLEDs) and photovoltaic cells due to its electron-accepting properties.
• Analytical Reagent and Indicator Chemistry: Employed in the development of chemical sensors and pH or ion-selective indicators.

Basic Information

Item	Details
Product Name	Benzoxazolium,5-Chloro-2-[2-[(5-Chloro-3-Ethyl-2(3H)-Benzoxazolylidene)Methyl]-3-(4-Sulfobutyl)-, Inner Salt
CAS No.	97453-88-8
Molecular Formula	C22H23Cl2N2O4S
Molecular Weight	482.40 g/mol
Synonyms	5-Chloro-2-[2-[(5-chloro-3-ethyl-2(3H)-benzoxazolylidene)methyl]-3-(4-sulfobutyl)benzoxazolium hydroxide, inner salt; NK-2016; Benzoxazolium dye intermediate; 2(3H)-Benzoxazolone, 5-chloro-3-ethyl-2-[[3-(4-sulfobutyl)-5-chloro-2-benzoxazolyl]methylene]-, betaine; NIR dye precursor; Sulfobutyl benzoxazolium salt
EINECS	Contact for details

Quality Control

Our production of this benzoxazolium intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical techniques including HPLC, NMR, and mass spectrometry. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your R&D and manufacturing quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under dry conditions to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark green to brown powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water, DMSO, methanol

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.