Description

Benzothiazolium, 5-Chloro-2-[3-[5-Chloro-3-(3-Sulfopropyl)-2(3H)-Benzothiazolylidene]-1-Cyclopenten-1-Yl]-3-(3-Sulfopropyl)-, Inner Salt, Sodium Salt is a specialized cyanine dye derivative with a polymethine structure, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is engineered for high-performance applications requiring precise photophysical characteristics, including excellent photostability and solubility in aqueous and polar organic media. It is a critical material for researchers and manufacturers in advanced fields such as optical data storage, biomedical imaging, and the development of functional dyes for high-tech materials.

Application

• NIR Fluorescent Probes & Labels: Used as a key chromophore in the synthesis of fluorescent tags and probes for bioimaging, flow cytometry, and in vivo diagnostic applications.
• Optical Data Storage Media: Serves as a recording layer dye for write-once and rewritable optical discs (e.g., CD-R, DVD-R) due to its specific light absorption profile.
• Laser & Photonic Materials: Incorporated into gain media, saturable absorbers, and nonlinear optical materials for laser systems and photonic device fabrication.
• Functional Dye Synthesis: Acts as a versatile intermediate for creating specialized dyes used in textile coloration, ink-jet printing, and security inks.
• Sensor Development: Utilized in the design of chemical and biological sensors where its fluorescence properties change upon interaction with specific analytes.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer in preclinical research for targeted cancer therapies.

Basic Information

Product Name	Benzothiazolium, 5-Chloro-2-[3-[5-Chloro-3-(3-Sulfopropyl)-2(3H)-Benzothiazolylidene]-1-Cyclopenten-1-Yl]-3-(3-Sulfopropyl)-, Inner Salt, Sodium Salt
CAS No.	351524-15-7
Molecular Formula	C27H27Cl2N2O6S3•Na
Molecular Weight	689.66 g/mol (Free acid)
Synonyms	5-Chloro-2-[3-[5-chloro-3-(3-sulfopropyl)-2(3H)-benzothiazolylidene]-1-cyclopenten-1-yl]-3-(3-sulfopropyl)benzothiazolium, inner salt, sodium salt; Cyanine dye, NIR heptamethine; IR-786 related dye; 1-Cyclopenten-1-yl, benzothiazolium derivative; Sodium 5-chloro-2-[3-[5-chloro-3-(3-sulfonatopropyl)-2(3H)-benzothiazolylidene]-1-cyclopenten-1-yl]-3-(3-sulfonatopropyl)benzothiazolium; Heptamethine cyanine dye sulfonate; NIR-absorbing cyanine dye.
EINECS	Contact for details

Quality Control

Our production of this high-purity cyanine dye adheres to strict quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry to confirm identity, purity, and photophysical properties. Certificates of Analysis (COA) detailing assay, impurity profile, absorbance/fluorescence maxima, and extinction coefficient are provided with every shipment. We support compliance with relevant research and industrial standards.

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); the container must be kept tightly sealed in a dry environment to prevent absorption of water. For long-term storage, consider desiccants or inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-black powder or crystals
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 95.0%
λmax (Absorption)	780 - 800 nm (in methanol)
Extinction Coefficient (ε)	≥ 200,000 L·mol⁻¹·cm⁻¹
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%

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