Description

2-[2-[2-Chloro-3-[2-(1,3-Dihydro-1,3,3-Trimethyl-2H-Indol-2-Ylidene)Ethylidene]-1-Cyclohexen-1-Yl]Ethynyl]-1,3,3-Trimethyl-3H-Indolium 4-Methylbenzenesulfonate is a high-purity, functional cyanine dye salt critical for advanced photonic and electronic applications. Its value lies in its exceptional optical properties, including strong near-infrared (NIR) absorption and fluorescence, which are tunable based on its molecular environment. This compound is essential for researchers and manufacturers in the fields of optical data storage, laser technology, non-linear optics (NLO), and as a sensitizer in photographic and photopolymerization systems.

Application

• Optical Data Storage Media: As a key dye component in recordable CD-R and DVD-R discs for precise laser writing.
• Laser Dyes and Optical Limiters: Utilized in tunable dye lasers and devices that protect sensors from intense light pulses.
• Non-Linear Optical (NLO) Materials: A building block for advanced materials used in frequency doubling, optical switching, and telecommunications.
• Photographic Sensitizers: Enhances the spectral sensitivity of photographic emulsions, particularly in the infrared region.
• Photopolymerization Initiators: Acts as a photoinitiator or co-initiator in UV-curable inks, coatings, and 3D printing resins.
• Biomedical Imaging Probes: Potential use in developing NIR fluorescent tags and probes for bioimaging and diagnostics due to its emission profile.
• Organic Photovoltaic (OPV) Research: Investigated 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.

Basic Information

Item	Details
Product Name	2-[2-[2-Chloro-3-[2-(1,3-Dihydro-1,3,3-Trimethyl-2H-Indol-2-Ylidene)Ethylidene]-1-Cyclohexen-1-Yl]Ethynyl]-1,3,3-Trimethyl-3H-Indolium 4-Methylbenzenesulfonate
CAS No.	205744-92-9
Molecular Formula	C39H41ClN2O3S
Molecular Weight	653.27 g/mol
Synonyms	Cy5 Tosylate; 1,3,3-Trimethyl-2-[5-(1,3,3-trimethyl-1,3-dihydro-2H-indol-2-ylidene)penta-1,3-dien-1-yl]-3H-indolium 4-methylbenzenesulfonate (chlorinated derivative); NIR Cyanine Dye Salt; 2-[2-[2-Chloro-3-[2-(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene]-1-cyclohexen-1-yl]ethenyl]-1,3,3-trimethyl-3H-indolium p-toluenesulfonate; Heptamethine cyanine dye tosylate; IR-786 related dye; Cryptocyanine family dye
EINECS	Contact for details

Quality Control

Every batch of our cyanine dye is manufactured and analyzed under strict quality management protocols to ensure exceptional purity and batch-to-batch consistency. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as identity (HPLC, NMR), assay purity (HPLC), and impurity profiles. Our production adheres to cGMP principles where applicable, supporting its use in research and advanced material development. Specifications can be tailored to meet the rigorous demands of optical material manufacturing and pharmaceutical research.

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 dry environment to prevent degradation. For long-term storage, consider desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (HPLC)	Conforms
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Single Unknown Impurity (HPLC)	≤ 0.5%
Total Impurities (HPLC)	≤ 2.0%

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