Description

3-(2-Carboxyethyl)-2-[2-[[3-(2-Carboxyethyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-5-Chlorobenzothiazolium Iodide is a specialized cyanine dye intermediate of significant commercial and research interest. This compound matters for its role as a key building block in the synthesis of near-infrared (NIR) fluorescent dyes and photosensitizers, offering precise optical properties. It is primarily needed by manufacturers and R&D teams in the advanced materials, biotechnology, and diagnostic sectors for developing sensitive detection systems and photodynamic therapy agents.

Application

• NIR Fluorescent Dye Synthesis: A critical precursor for manufacturing cyanine dyes used in bioimaging, flow cytometry, and in vivo diagnostics.
• Photosensitizer Development: Serves as a core structure for creating agents used in photodynamic therapy (PDT) for cancer treatment.
• Optical Material Production: Used in the formulation of advanced materials for optical data storage, laser technology, and non-linear optics.
• Bioconjugation & Labeling: Functional groups allow for conjugation to antibodies, proteins, or nanoparticles for targeted imaging applications.
• Sensor & Detector Fabrication: Employed in the development of chemical sensors and biosensors due to its tunable photophysical characteristics.
• Academic & Industrial Research: A valuable reagent for exploring new photochemical processes and novel dye architectures.

Basic Information

Product Name	3-(2-Carboxyethyl)-2-[2-[[3-(2-Carboxyethyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-5-Chlorobenzothiazolium Iodide
CAS No.	94158-26-6
Molecular Formula	C26H24ClIN2O4S2
Molecular Weight	679.02 g/mol
Synonyms	5-Chloro-2-[2-[(E)-3-(2-carboxyethyl)-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-3-(2-carboxyethyl)benzothiazolium iodide; Cyanine dye intermediate 94158-26-6; NIR dye precursor; Benzothiazolium, 3-(2-carboxyethyl)-2-[2-[[3-(2-carboxyethyl)-3H-benzothiazol-2-ylidene]methyl]-1-butenyl]-5-chloro-, iodide (1:1); Heptamethine cyanine dye derivative; IR-780 related intermediate
EINECS	Contact for details

Quality Control

Our production of 3-(2-Carboxyethyl)-2-[2-[[3-(2-Carboxyethyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-5-Chlorobenzothiazolium Iodide adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity, which is critical for sensitive optical applications. Each lot undergoes comprehensive analysis including HPLC for purity, NMR for structural confirmation, and spectrophotometry for optical property verification. Certificates of Analysis (COA) detailing all specifications are provided and can be tailored to meet specific customer or regulatory requirements.

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 compound is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) when not in use to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
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.