Description

2-[3-[3,3-Dimethyl-1-(4-Sulfobutyl)-1,3-Dihydroindol-2-Ylidene]Propenyl]-3,3-Dimethyl-1-(4-Sulfobutyl)-3H-Indolium Inner Salt Sodium Salt is a high-purity, functional cyanine dye salt, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is essential for applications requiring precise optical characteristics and excellent water solubility due to its sulfobutyl substituents. It is primarily needed by manufacturers in the biotechnology, medical diagnostics, and advanced material science sectors for developing sensitive probes and functional coatings.

Application

• Fluorescent Labeling Agent: Used as a covalent or non-covalent label for biomolecules (proteins, nucleic acids) in bioassays and flow cytometry.
• NIR Imaging Probes: A key component in the synthesis of contrast agents for in vivo and in vitro near-infrared fluorescence imaging.
• Optical Sensor Fabrication: Incorporated into polymer matrices or nanoparticle surfaces to create sensors for pH, ions, or specific analytes.
• Photodynamic Therapy (PDT): Investigated as a potential photosensitizer due to its ability to generate reactive oxygen species upon light irradiation.
• Laser Dye and Optical Recording Media: Utilized in tunable dye lasers and as a functional dye for optical data storage systems.
• Material Science Research: Serves as a model compound for studying electron transfer, aggregation behavior, and photophysical properties of cyanine dyes.

Basic Information

Product Name	2-[3-[3,3-Dimethyl-1-(4-Sulfobutyl)-1,3-Dihydroindol-2-Ylidene]Propenyl]-3,3-Dimethyl-1-(4-Sulfobutyl)-3H-Indolium Inner Salt Sodium Salt
CAS No.	120724-84-7
Molecular Formula	C37H47N2O6S2Na
Molecular Weight	702.90 g/mol
Synonyms	IR-783; SDB-783; Sulfo-Cyanine7.5; 1,1',3,3'-Tetramethyl-1,1'-bis(4-sulfobutyl)-4,5,4',5'-dibenzoindotricarbocyanine Sodium Salt; 2-[3-[1,3-Dihydro-3,3-dimethyl-1-(4-sulfobutyl)-2H-indol-2-ylidene]propenyl]-3,3-dimethyl-1-(4-sulfobutyl)-3H-indolium hydroxide inner salt sodium salt; NIR-783 Dye; Heptamethine cyanine dye with sulfonate groups; Bis(4-sulfobutyl)indotricarbocyanine sodium salt
EINECS	Contact for details

Quality Control

Our production of this cyanine dye adheres to stringent quality protocols to ensure batch-to-batch consistency and optimal performance. Each lot is characterized by advanced analytical techniques including HPLC, NMR, and mass spectrometry to confirm identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing spectral properties (absorption/emission maxima), purity, and moisture content is 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). This material is hygroscopic (moisture-sensitive); ensure the container is sealed immediately after use to prevent degradation from atmospheric moisture. For long-term storage, consider desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-black powder
Identification (IR)	Conforms to structure
Identification (UV-Vis)	λmax: 783 ± 5 nm
Purity (HPLC)	≥ 95.0%
Moisture Content (KF)	≤ 5.0%
Extinction Coefficient	≥ 200,000 L·mol-1·cm-1 at λmax
Heavy Metals	≤ 20 ppm
Solubility (Water)	Freely soluble

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