Description

3-[4-[(Acetylamino)Sulphonyl]Butyl]-5-Cyano-2-[3-(5-Cyano-1,3-Diethyl-1,3-Dihydro-2H-Benzimidazol-2-Ylidene)-1-Propenyl]-1-Ethyl-1H-Benzimidazolium Bromide is a specialized, high-purity cyanine dye intermediate with a complex heterocyclic structure. This compound is critical for the synthesis of near-infrared (NIR) fluorescent dyes and photosensitizers, offering precise optical properties for advanced applications. It is primarily required by manufacturers in the biotechnology, medical diagnostics, and advanced materials research sectors.

Application

• Key Intermediate for NIR Fluorescent Dyes: Synthesis of heptamethine cyanine dyes used in bioimaging and flow cytometry.
• Photosensitizer Development: Research and production of compounds for photodynamic therapy (PDT) and other light-activated medical treatments.
• Optical Sensor Fabrication: Manufacturing of chemical sensors and probes that operate in the near-infrared spectrum for enhanced tissue penetration.
• Advanced Material Research: Component in the development of organic semiconductors, non-linear optical materials, and dye-sensitized solar cells.
• Analytical Reagent: Used as a high-purity standard or reagent in spectroscopic analysis and method development.

Basic Information

Product Name	3-[4-[(Acetylamino)Sulphonyl]Butyl]-5-Cyano-2-[3-(5-Cyano-1,3-Diethyl-1,3-Dihydro-2H-Benzimidazol-2-Ylidene)-1-Propenyl]-1-Ethyl-1H-Benzimidazolium Bromide
CAS No.	33625-61-5
Molecular Formula	C₃₃H₃₈BrN₇O₃S
Molecular Weight	692.67 g/mol
Synonyms	IR-780 related benzimidazolium bromide; Heptamethine cyanine dye intermediate; 1-Ethyl-2-[3-(1-ethyl-1,3-dihydro-5-cyano-2H-benzimidazol-2-ylidene)-1-propenyl]-5-cyano-3-[4-(acetylamino)sulfonylbutyl]-1H-benzimidazolium bromide; NIR dye precursor; Cy7-type dye synthon; Benzimidazolium, 3-[4-[(acetylamino)sulfonyl]butyl]-5-cyano-2-[3-(5-cyano-1,3-diethyl-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propen-1-yl]-1-ethyl-, bromide (1:1)
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict cGMP guidelines to ensure batch-to-batch consistency and traceability. Every lot undergoes comprehensive analytical characterization, including HPLC for purity, NMR for structural confirmation, and mass spectrometry. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profile is provided with each shipment to support your quality assurance protocols.

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 product is hygroscopic (moisture-sensitive) and should be handled under anhydrous conditions or a dry inert atmosphere to prevent degradation.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (HPLC)	Conforms to reference standard
Identification (NMR)	Conforms to structure
Purity (HPLC, Area %)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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