Description

1-[2-(acetoxy)ethyl]-2-[3-[3-[2-(acetoxy)ethyl]-5,6-dichloro-1-ethyl-1,3-dihydro-2H-benzimidazol-2-ylidene]-1-propenyl]-5,6-dichloro-3-ethyl-1H-benzimidazolium bromide is a high-purity, symmetrical cyanine dye derivative belonging to the benzimidazolium class. This compound is valued for its strong near-infrared (NIR) absorption and fluorescence properties, making it a critical functional material for advanced optical applications. It is primarily sought by manufacturers and research institutions in the photonics, biomedical imaging, and specialty chemical synthesis sectors.

Application

• NIR Fluorescent Dye Synthesis: A key intermediate for producing cyanine dyes used in bioimaging, flow cytometry, and in vivo diagnostics.
• Optical Data Storage: Utilized in the formulation of recording layers for high-density optical discs due to its specific light-absorbing characteristics.
• Laser Technology: Serves as a gain medium or saturable absorber in tunable dye lasers operating in the near-infrared spectrum.
• Photodynamic Therapy (PDT): Investigated as a potential photosensitizer precursor for targeted cancer treatments.
• Nonlinear Optical Materials: Used in research and development of materials for optical limiting, switching, and frequency conversion.
• Analytical Chemistry Reagents: Functions as a sensitive fluorescent probe or tag for detecting and quantifying biological molecules.
• Security Inks & Taggants: Incorporated into inks for anti-counterfeiting applications due to its unique, difficult-to-replicate optical signature.

Basic Information

Product Name	1-[2-(acetoxy)ethyl]-2-[3-[3-[2-(acetoxy)ethyl]-5,6-dichloro-1-ethyl-1,3-dihydro-2H-benzimidazol-2-ylidene]-1-propenyl]-5,6-dichloro-3-ethyl-1H-benzimidazolium bromide
CAS No.	25243-59-8
Molecular Formula	C₃₃H₃₆BrCl₄N₄O₄
Molecular Weight	773.37 g/mol
Synonyms	IR-780 iodide analog (bromide salt); 1,1',3,3'-Tetraethyl-5,5',6,6'-tetrachloro-benzimidacarbocyanine bromide diacetate; Bis[2-(acetyloxy)ethyl]-5,6-dichloro-1-ethyl-3-[3-[5,6-dichloro-1-ethyl-2(1H)-benzimidazolylidene]-1-propenyl]-2(1H)-benzimidazolium bromide; DTTC Iodide derivative; NIR-797 bromide; Heptamethine cyanine dye bromide salt; 5,5',6,6'-Tetrachloro-1,1',3,3'-tetraethylimidacarbocyanine bromide diacetate
EINECS	Contact for details

Quality Control

Our production of this cyanine dye intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high performance in downstream applications. Quality is verified through comprehensive 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 quality assurance and regulatory needs.

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 and should be handled under subdued lighting. For long-term storage, consider inert atmosphere conditions to maintain optimal stability.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 2.0 %
Residue on Ignition	≤ 1.0 %
Heavy Metals (as Pb)	≤ 20 ppm
λmax (Absorption)	780 ± 5 nm (in suitable solvent)

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