Description

3-Ethyl-2-[3-(3-Ethyl-3H-Benzothiazol-2-Ylidene)-2-Methylprop-1-Enyl]Benzothiazolium Bromide is a high-purity, functional organic salt belonging to the cyanine dye family, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is critical for advanced applications requiring precise light absorption and emission characteristics. It is primarily sought by manufacturers and researchers in the photonics, optical data storage, and biomedical imaging sectors.

Application

• NIR Fluorescent Dyes & Probes: A key chromophore for synthesizing near-infrared fluorescent labels used in bioimaging and diagnostic assays.
• Optical Data Storage Media: Used in the formulation of recordable CDs, DVDs, and advanced optical discs due to its excellent light-absorption profile.
• Laser & Photonic Materials: Serves as a gain medium or saturable absorber in dye lasers and other photonic devices operating in specific wavelength ranges.
• Solar Cell & OLED Research: Investigated as an active component in organic photovoltaic cells and light-emitting diodes for its electron-accepting properties.
• Sensitizers in Photography: Functions as a spectral sensitizer in photographic emulsions to extend the sensitivity into longer wavelengths.
• Chemical Sensors: Employed in the development of colorimetric and fluorometric sensors for detecting specific ions or molecules.

Basic Information

Product Name	3-Ethyl-2-[3-(3-Ethyl-3H-Benzothiazol-2-Ylidene)-2-Methylprop-1-Enyl]Benzothiazolium Bromide
CAS No.	1745-32-0
Molecular Formula	C23H23BrN2S2
Molecular Weight	471.47 g/mol
Synonyms	3-Ethyl-2-[3-(3-ethyl-2(3H)-benzothiazolylidene)-2-methyl-1-propen-1-yl]benzothiazolium bromide; 2-[3-(3-Ethyl-2-benzothiazolinylidene)-2-methyl-1-propenyl]-3-ethylbenzothiazolium bromide; Cyanine dye 1745-32-0; NIR Cyanine Dye; Benzothiazolium, 3-ethyl-2-[3-(3-ethyl-2(3H)-benzothiazolylidene)-2-methyl-1-propenyl]-, bromide; Astrazon Orange R (related class); Basic Orange 21 (CI 48035)
EINECS	Contact for details

Quality Control

Our production of 3-Ethyl-2-[3-(3-Ethyl-3H-Benzothiazol-2-Ylidene)-2-Methylprop-1-Enyl]Benzothiazolium Bromide adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability for sensitive applications. Each lot is characterized by advanced analytical techniques including HPLC, NMR, and mass spectrometry. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); therefore, containers should be kept sealed under an inert atmosphere such as nitrogen or argon for long-term storage to prevent degradation and moisture absorption.

Specification

Item	Specification
Appearance	Dark green to bronze crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0% (Area Percent)
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Absorption Max (λmax)	Specified per customer grade

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