Description

3H-Indolium, 2-[2-(4-Hydroxy-3,5-Diiodophenyl)Ethenyl]-3,3-Dimethyl-1-(3-Sulfopropyl)-, Inner Salt is a specialized zwitterionic cyanine dye derivative, valued for its distinct photophysical properties and chemical reactivity. This compound is critical for applications requiring precise molecular recognition and signal generation, particularly in advanced diagnostic and analytical fields. It is primarily sought by researchers and manufacturers in the life sciences, biotechnology, and specialty chemical sectors for developing sensitive detection systems and novel functional materials.

Application

• Fluorescent Labeling Agent: Used as a reactive dye for labeling proteins, antibodies, and nucleic acids in bioassays and diagnostic kits.
• Biomolecular Probe Development: Serves as a key intermediate in synthesizing probes for fluorescence microscopy, flow cytometry, and in vivo imaging.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer due to its light-absorbing characteristics and ability to generate reactive oxygen species.
• Chemical Sensor Fabrication: Incorporated into polymer matrices or solid supports for creating optical sensors that detect specific ions or biomolecules.
• Nonlinear Optical Materials: Utilized in research for developing organic materials with specific second- or third-order nonlinear optical properties.
• Dye-Sensitized Solar Cell (DSSC) Components: Explored as a potential sensitizing dye to enhance light-harvesting efficiency in photovoltaic research.

Basic Information

Product Name	3H-Indolium, 2-[2-(4-Hydroxy-3,5-Diiodophenyl)Ethenyl]-3,3-Dimethyl-1-(3-Sulfopropyl)-, Inner Salt
CAS No.	145876-11-5
Molecular Formula	C22H24I2N2O4S
Molecular Weight	658.31 g/mol
Synonyms	3H-Indolium, 2-[2-(4-hydroxy-3,5-diiodophenyl)ethenyl]-3,3-dimethyl-1-(3-sulfopropyl)-, inner salt; 2-[2-(4-Hydroxy-3,5-diiodophenyl)vinyl]-3,3-dimethyl-1-(3-sulfopropyl)-3H-indolium, hydroxide, inner salt; Cy3.5 carboxylic acid derivative; Sulfo-Cyanine3.5 acid; 1-(3-Sulfopropyl)-2-[2-(4-hydroxy-3,5-diiodophenyl)vinyl]-3,3-dimethyl-3H-indolium, inner salt; Hydroxy-diiodo-styryl dye; Zwitterionic cyanine dye; Contact for details on additional trade names.
EINECS	Contact for details

Quality Control

Our production of this specialty dye adheres to stringent quality protocols to ensure batch-to-batch consistency and high performance in sensitive applications. Each lot is characterized using 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 all specifications is provided with every shipment to support your quality assurance and regulatory documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed in a dry environment to prevent moisture absorption, which can affect stability and performance. For long-term storage, consider desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	Dark red to purple solid
Identification (IR)	Conforms to structure
Identification (HPLC)	Main peak retention time matches reference
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 3.0%
Residue on Ignition	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Specific Absorbance	Contact for details

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