Description

2-[2-(4,5-Dihydro-3-Phenyl-1H-Pyrazol-1-Yl)Vinyl]-1,3,3-Trimethyl-3H-Indolium Chloride is a specialized cationic dye intermediate and a functional organic salt with a complex heterocyclic structure. This compound is valued for its role as a key precursor in the synthesis of advanced cyanine dyes and other functional chromophores. It is primarily required by manufacturers in the fine chemicals, specialty dyes, and advanced materials sectors, particularly for research and production involving near-infrared (NIR) absorbers and photographic sensitizers.

Application

• Cyanine Dye Synthesis: A critical building block for producing heptamethine and other polymethine cyanine dyes used in bioimaging and diagnostics.
• NIR-Absorbing Materials: Used in the development of materials for laser protection, optical filters, and data storage.
• Photographic Sensitizers: Serves as a key intermediate for spectral sensitizers in silver halide photographic emulsions.
• Organic Photovoltaics & OLEDs: Investigated as a component in the synthesis of organic semiconductors for light-harvesting and emitting layers.
• Bioconjugation Probes: Utilized in creating fluorescent labels and tags for biological assays and cellular imaging.
• Research & Development: Employed in academic and industrial R&D for exploring new photophysical properties and applications in optoelectronics.

Basic Information

Product Name	2-[2-(4,5-Dihydro-3-Phenyl-1H-Pyrazol-1-Yl)Vinyl]-1,3,3-Trimethyl-3H-Indolium Chloride
CAS No.	31612-53-0
Molecular Formula	C22H24ClN3
Molecular Weight	365.90 g/mol
Synonyms	1,3,3-Trimethyl-2-[2-(3-phenyl-4,5-dihydro-1H-pyrazol-1-yl)ethenyl]-3H-indolium chloride; 2-[2-(3-Phenyl-4,5-dihydro-1H-pyrazol-1-yl)vinyl]-1,3,3-trimethyl-3H-indolium chloride; Fischer's Base Pyrazoline Salt; Indolinium, 2-[2-(4,5-dihydro-3-phenyl-1H-pyrazol-1-yl)ethenyl]-1,3,3-trimethyl-, chloride; Cyanine dye intermediate KF; NIR dye precursor
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to stringent quality management systems. Every batch is characterized and tested using advanced analytical techniques including HPLC, NMR, and mass spectrometry to ensure structural integrity and purity. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your R&D and quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep the container tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	Dark red to brown 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.