Description

1-Icosyl-2-[(E)-3-(1-Icosyl-3,3-Dimethyl-1,3-Dihydro-2H-Indol-2-Ylidene)-1-Propenyl]-3,3-Dimethyl-3H-Indolium Iodide is a high-purity, symmetrical cyanine dye derivative, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is engineered for applications requiring exceptional photostability and specific spectral characteristics. It is a critical material for researchers and manufacturers in the fields of advanced materials science, optical imaging, and photonics.

Application

• NIR Fluorescent Probes & Labels: Used in the development of sensitive bioimaging agents and diagnostic assays.
• Optical Data Storage: Serves as a key component in advanced dye layers for high-density recording media.
• Laser Dyes & Photonics: Employed as a gain medium or saturable absorber in tunable dye lasers and optical switches.
• Nonlinear Optical Materials: A building block for organic crystals and polymers with high second- or third-order nonlinear susceptibility.
• Solar Cell Research: Investigated as a photosensitizer in dye-sensitized solar cells (DSSCs) due to its broad absorption.
• Sensor Development: Incorporated into chemical sensors and biosensors for detecting specific analytes via fluorescence changes.

Basic Information

Product Name	1-Icosyl-2-[(E)-3-(1-Icosyl-3,3-Dimethyl-1,3-Dihydro-2H-Indol-2-Ylidene)-1-Propenyl]-3,3-Dimethyl-3H-Indolium Iodide
CAS No.	75664-03-8
Molecular Formula	C55H95IN2
Molecular Weight	887.25 g/mol
Synonyms	1,1'-Diicosyl-3,3,3',3'-tetramethylindodicarbocyanine Iodide; DiIC20(3) Iodide; 1,1'-Diicosylindodicarbocyanine Iodide; DIDC Iodide; DIDC(20) Iodide; Long-chain carbocyanine dye; NIR-664 dye analog; Symmetrical indole-based cyanine dye
EINECS	Contact for details

Quality Control

Our production of this specialty cyanine dye adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Each lot is characterized by advanced analytical techniques including HPLC, NMR, and UV-Vis-NIR spectroscopy to confirm identity, purity, and spectral properties. A comprehensive Certificate of Analysis (COA) detailing all specifications is 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 hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed in a desiccated environment to prevent degradation. For long-term stability, consider storage under an inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
λabs max (in solvent)	644 - 648 nm
λem max (in solvent)	664 - 670 nm
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.5%

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