Description

1H-BENZ[E]INDOLIUM, 2-[5-[1,3-DIHYDRO-1,1-DIMETHYL-3-(3-SULFOPROPYL)-2H-BENZ[E]INDOL-2-YLIDENE]-1,3-PENTADIENYL]-1,1-DIMETHYL-3-(3-SULFOPROPYL)-, INNER SALT, SODIUM SALT is a high-purity, sulfonated cyanine dye intermediate with significant commercial and research utility. Its value lies in its strong near-infrared (NIR) absorption and fluorescence properties, making it a critical component for advanced optical applications. This compound is essential for manufacturers and R&D teams in the biotechnology, medical diagnostics, and material science sectors, particularly for developing sensitive probes and functional dyes.

Application

• NIR Fluorescent Dye Synthesis: A key precursor for synthesizing heptamethine cyanine dyes used in bioimaging and flow cytometry.
• Bioconjugation & Probe Development: Used to create labeled antibodies, peptides, and nucleic acids for in vitro and in vivo diagnostics.
• Optical Sensor Fabrication: Incorporated into polymer matrices or nanoparticles to create sensors for pH, ions, or specific biomolecules.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer due to its light-absorbing characteristics in the therapeutic window.
• Laser & Optical Material Development: Serves as a dopant for tunable dye lasers and non-linear optical materials.
• Industrial Marking & Security Inks: Utilized in formulations for covert security printing and anti-counterfeiting tags.

Basic Information

Item	Details
Product Name	1H-BENZ[E]INDOLIUM, 2-[5-[1,3-DIHYDRO-1,1-DIMETHYL-3-(3-SULFOPROPYL)-2H-BENZ[E]INDOL-2-YLIDENE]-1,3-PENTADIENYL]-1,1-DIMETHYL-3-(3-SULFOPROPYL)-, INNER SALT, SODIUM SALT
CAS No.	138248-55-2
Molecular Formula	C39H45N2O6S2Na
Molecular Weight	724.90 g/mol
Synonyms	IR-783; IR 783; IR783; 1,1-Dimethyl-3-(3-sulfopropyl)-2-[5-(1,1,3-trimethyl-1,3-dihydro-2H-benz[e]indol-2-ylidene)penta-1,3-dienyl]-1H-benz[e]indolium hydroxide inner salt sodium salt; Sodium 2-[5-(1,1-dimethyl-3-sulfonatopropyl-1,3-dihydro-benz[e]indol-2-ylidene)-penta-1,3-dienyl]-1,1-dimethyl-3-sulfonatopropyl-1H-benz[e]indolium; Heptamethine cyanine dye IR-783; NIR dye 783; Benz[e]indolium, 2-[5-(1,3-dihydro-1,1-dimethyl-3-(3-sulfopropyl)-2H-benz[e]indol-2-ylidene)-1,3-pentadienyl]-1,1-dimethyl-3-(3-sulfopropyl)-, hydroxide, inner salt, sodium salt
EINECS	Contact for details

Quality Control

Our production of this cyanine dye intermediate adheres to strict in-process controls to ensure batch-to-batch consistency and high chemical purity. Each lot is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and spectroscopic data is provided with every shipment to support your quality assurance protocols.

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 product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider desiccation.

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%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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