Description

3H-INDOLIUM, 2-[2-[2-CHLORO-3-[[1,3-DIHYDRO-3,3-DIMETHYL-1-(3-SULFOPROPYL)-2H-INDOL-2-YLIDENE]ETHYLIDENE]-1-CYCLOHEXEN-1-YL]ETHENYL]-3,3-DIMETHYL-1-(3-SULFOPROPYL)-, INNER SALT, SODIUM SALT is a high-purity, functional cyanine dye derivative characterized by its sulfonated, water-soluble structure. This compound matters for its exceptional photophysical properties, including strong near-infrared (NIR) absorption and fluorescence, making it a critical component in advanced optical applications. It is primarily needed by manufacturers and research institutions in the biotechnology, medical diagnostics, and materials science sectors for developing sensitive detection systems and functional materials.

Application

• Fluorescent Labeling and Staining: Used as a covalent or non-covalent label for proteins, nucleic acids, and other biomolecules in bioassays and microscopy.
• Optical Imaging Probes: A key component in the synthesis of contrast agents for in vivo and in vitro fluorescence imaging, particularly in the NIR window.
• Laser Dye and Photonic Materials: Employed in the formulation of tunable dye lasers and the development of advanced photonic crystals and nonlinear optical materials.
• Sensor Development: Integrated into chemical and biological sensors for the detection of ions, gases, and specific analytes due to its environment-sensitive emission.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer in preclinical research for targeted cancer therapies.
• Solar Cell and OLED Research: Utilized in organic photovoltaic cells and light-emitting diodes as a functional dye to manipulate light absorption and charge transport.

Basic Information

Product Name	3H-INDOLIUM, 2-[2-[2-CHLORO-3-[[1,3-DIHYDRO-3,3-DIMETHYL-1-(3-SULFOPROPYL)-2H-INDOL-2-YLIDENE]ETHYLIDENE]-1-CYCLOHEXEN-1-YL]ETHENYL]-3,3-DIMETHYL-1-(3-SULFOPROPYL)-, INNER SALT, SODIUM SALT
CAS No.	115970-63-3
Molecular Formula	C37H45ClN2NaO6S2
Molecular Weight	735.33 g/mol
Synonyms	IR-783; IR 783; IR783; 1H-Benz[e]indolium, 2-[2-[2-chloro-3-[(1,3-dihydro-3,3-dimethyl-1-(3-sulfopropyl)-2H-benz[e]indol-2-ylidene)ethylidene]-1-cyclohexen-1-yl]ethenyl]-3,3-dimethyl-1-(3-sulfopropyl)-, inner salt, sodium salt; 2-[2-[2-Chloro-3-[(1,3-dihydro-3,3-dimethyl-1-(3-sulfopropyl)-2H-benz[e]indol-2-ylidene)ethylidene]-1-cyclohexen-1-yl]ethenyl]-3,3-dimethyl-1-(3-sulfopropyl)-1H-benz[e]indolium, inner salt, sodium salt; SDB 783; Sulfo-Cyanine7.5; NIR-783 Dye
EINECS	Contact for details

Quality Control

Our IR-783 dye is manufactured under strict quality management systems to ensure batch-to-batch consistency and high performance. Each lot undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometric analysis for absorbance/fluorescence verification, and identity confirmation. Certificates of Analysis (COA) detailing all specifications are provided with every shipment. We support custom synthesis and purification to meet specific research or production-grade requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C for long-term stability. This product is hygroscopic (moisture-sensitive) and light-sensitive; ensure containers are sealed immediately after use to minimize exposure to air and humidity. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark green to blue-black powder
Identification (IR)	Conforms to structure
Identification (UV-Vis)	Conforms (λmax ~783 nm in methanol)
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%
Extinction Coefficient	Contact for details
Fluorescence Quantum Yield	Contact for details

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