Description

1,3-Diethyl-2-(3-(1,3-Dihydro-1,3,3-Trimethyl-2H-Indol-2-Ylidene)-1-Propenyl)-1H-Naphth(2,3-D)Imidazolium is a high-value, specialized cyanine dye intermediate with a complex polymethine structure. This compound is critical for the synthesis of near-infrared (NIR) absorbing and fluorescent dyes used in advanced optical applications. It is primarily required by manufacturers in the photographic, optical data storage, laser, and biomedical imaging sectors who demand precise chromophore building blocks for product development.

Application

• NIR Cyanine Dye Synthesis: A key precursor for manufacturing heptamethine cyanine dyes used in bioimaging and diagnostics.
• Optical Recording Media: Used in the formulation of dyes for recordable CD-R and DVD-R media.
• Laser Technology: Serves as a starting material for dyes in tunable liquid and solid-state dye lasers.
• Photographic Sensitizers: Employed in the production of spectral sensitizers for silver halide photographic emulsions.
• Non-Linear Optical Materials: A building block for organic compounds with applications in photonics and optoelectronics.
• Sensor Development: Used in research and development of chemical and biological sensors based on fluorescence.

Basic Information

Product Name	1,3-Diethyl-2-(3-(1,3-Dihydro-1,3,3-Trimethyl-2H-Indol-2-Ylidene)-1-Propenyl)-1H-Naphth(2,3-D)Imidazolium
CAS No.	139167-47-8
Molecular Formula	C31H34N3+
Molecular Weight	448.62 g/mol
Synonyms	1H-Naphth[2,3-d]imidazolium, 1,3-diethyl-2-[3-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-1-propenyl]-, inner salt; 2-[3-(1,3-Dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)-1-propenyl]-1,3-diethyl-1H-naphth[2,3-d]imidazolium; Cyanine dye intermediate; NIR dye precursor; Heptamethine cyanine dye intermediate; Polymethine dye salt; 1,3-Diethyl-2-[(1E,3E)-3-(1,3,3-trimethylindolin-2-ylidene)prop-1-en-1-yl]-1H-benzo[de]isoquinoline-2-ium
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high purity, which is essential for downstream synthesis performance. Each lot is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry. Comprehensive Certificates of Analysis (COA) detailing identity, purity, 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). The product is light-sensitive and should be handled under appropriate conditions to prevent degradation. Keep the container tightly sealed in a dry environment to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.