Description

5-Chloro-2-[3-[(5-Chloro-1-Ethyl-1,3-Dihydro-3,3-Dimethyl-2H-Indole)-2-Ylidene]-1-Propenyl]-1-Ethyl-3,3-Dimethyl-3H-Indole-1-Ium·Ethylsulfate is a high-purity, functional organic salt belonging to the heptamethine cyanine dye family. This compound matters as a critical intermediate and functional chromophore for advanced optical and electronic applications, offering excellent photostability and tunable absorption properties. It is primarily needed by manufacturers in the optical data storage, laser dyes, non-linear optics (NLO), and biomedical imaging sectors for developing next-generation materials.

Application

• Optical Data Storage Media: A key functional dye for recordable (R) and rewritable (RW) optical discs (e.g., CD-R, DVD±R).
• Laser Dye & NLO Materials: Used as an active medium in tunable dye lasers and in the synthesis of materials for frequency doubling and electro-optic modulation.
• Biomedical Imaging Probes: Serves as a near-infrared (NIR) fluorescent tag or precursor for labeling in bioassays and cellular imaging.
• Photodynamic Therapy (PDT): Investigated as a potential photosensitizer for targeted cancer treatments.
• Organic Photovoltaic (OPV) Cells: Utilized as an electron donor or acceptor material in the active layer of solar cells.
• Chemical Sensors: Employed in the development of colorimetric or fluorescent sensors for detecting specific ions or molecules.
• Inkjet Printing Inks: Provides high-performance colorants for specialized industrial and graphic arts printing.
• Academic & Industrial R&D: A vital building block for synthesizing novel functional dyes and exploring structure-property relationships.

Basic Information

Product Name	5-Chloro-2-[3-[(5-Chloro-1-Ethyl-1,3-Dihydro-3,3-Dimethyl-2H-Indole)-2-Ylidene]-1-Propenyl]-1-Ethyl-3,3-Dimethyl-3H-Indole-1-Ium·Ethylsulfate
CAS No.	124710-32-3
Molecular Formula	C30H38Cl2N2O4S
Molecular Weight	593.60 g/mol
Synonyms	5-Chloro-2-[3-[(5-chloro-1-ethyl-3,3-dimethyl-2-indolinylidene)-1-propenyl]-1-ethyl-3,3-dimethyl-3H-indolium ethyl sulfate; Cyanine dye, IR-125 derivative; Heptamethine cyanine dye salt; 1-Ethyl-2-[3-(1-ethyl-5-chloro-3,3-dimethyl-2-indolinylidene)-1-propenyl]-5-chloro-3,3-dimethyl-3H-indolium ethyl sulfate; NK-2014 (potential trade name); Optical recording dye C; NIR-1 dye; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our production of 5-Chloro-2-[3-[(5-Chloro-1-Ethyl-1,3-Dihydro-3,3-Dimethyl-2H-Indole)-2-Ylidene]-1-Propenyl]-1-Ethyl-3,3-Dimethyl-3H-Indole-1-Ium·Ethylsulfate adheres to a stringent quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity, NMR and IR for structural confirmation, and spectrophotometry for critical optical properties. Certificates of Analysis (COA) detailing all test results are provided to ensure traceability and compliance with your specific application requirements.

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). This compound is light-sensitive (store away from light) and hygroscopic (moisture-sensitive). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference
Purity (HPLC)	≥ 98.0% (Area %)
Loss on Drying	≤ 1.0 %
Residue on Ignition	≤ 0.5 %
Absorption Max (λmax)	780 - 800 nm (in suitable solvent)
Heavy Metals (as Pb)	≤ 20 ppm

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