Description

5,6-Dichloro-2-[3-(5,6-Dichloro-1,3-Diethyl-1,3-Dihydro-2H-Benzimidazol-2-Ylidene)-1-Propenyl]-1-Ethyl-3-(3-Sulphonatobutyl)-1H-Benzimidazolium is a high-purity, functional dye intermediate belonging to the benzimidazolium cyanine dye family. This compound is valued for its strong near-infrared (NIR) absorption and fluorescence properties, making it a critical component in advanced optical applications. It is primarily sought by manufacturers and researchers in the photonics, biomedical imaging, and security ink industries.

Application

• NIR Fluorescent Dyes & Probes: A key precursor for synthesizing cyanine dyes used in bioimaging, flow cytometry, and in vivo diagnostics.
• Optical Data Storage: Used in the formulation of recording layers for high-density optical discs and other data storage media.
• Laser & Photonic Materials: Incorporated into solid-state dye lasers, optical limiters, and non-linear optical (NLO) materials.
• Security Printing: Serves as a covert taggant in high-security inks for banknotes, certificates, and brand protection.
• Solar Cell Research: Investigated as a potential photosensitizer in dye-sensitized solar cells (DSSCs) and organic photovoltaics.
• Chemical Sensors: Utilized in the development of fluorescent chemosensors for detecting specific ions or molecules.

Basic Information

Item	Details
Product Name	5,6-Dichloro-2-[3-(5,6-Dichloro-1,3-Diethyl-1,3-Dihydro-2H-Benzimidazol-2-Ylidene)-1-Propenyl]-1-Ethyl-3-(3-Sulphonatobutyl)-1H-Benzimidazolium
CAS No.	28118-10-7
Molecular Formula	C27H30Cl4N4O3S
Molecular Weight	644.42 g/mol
Synonyms	IR-780 iodide analogue (sulfonated); 1-Ethyl-3-(3-sulfonatobutyl)-5,6-dichloro-2-[3-(1,3-diethyl-5,6-dichloro-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propenyl]-1H-benzimidazolium; Benzimidazolium, 5,6-dichloro-2-[3-(5,6-dichloro-1,3-diethyl-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propenyl]-1-ethyl-3-(3-sulfonatobutyl)-, inner salt; NIR Cyanine Dye Intermediate; Sulfonated Heptamethine Cyanine Dye Precursor
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and optimal performance in sensitive applications. Quality is verified through comprehensive analytical techniques including HPLC for purity, mass spectrometry (MS) for identity confirmation, and spectrophotometry to validate key optical properties. A detailed Certificate of Analysis (COA) is provided with each 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 material is hygroscopic (moisture-sensitive); ensure the container is kept sealed in a low-humidity environment to prevent degradation.

Specification

Item	Specification
Appearance	Dark green to blue-black powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%
Absorption λmax	770 - 790 nm

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