Description

3-Ethyl-2-[5-(3-Ethyl-3H-Naphtho[2,1-D]Thiazol-2-Ylidene)-Penta-1,3-Dienyl]-Naphtho[2,1-D]Thiazolium Chloride is a high-purity, synthetic organic compound belonging to the cyanine dye family, specifically a heptamethine cyanine dye. This compound is valued for its strong near-infrared (NIR) absorption and fluorescence properties, making it a critical functional material for advanced optical applications. It is primarily sought by manufacturers and researchers in the photonics, biomedical imaging, and specialty chemical synthesis sectors.

Application

• NIR Fluorescent Dye Synthesis: A key intermediate or final product for synthesizing near-infrared fluorescent dyes and probes used in bioimaging and medical diagnostics.
• Optical Sensor Fabrication: Used in the development of chemical sensors and biosensors that operate in the near-infrared region for enhanced sensitivity and reduced background interference.
• Laser Technology: Employed as a gain medium or saturable absorber in tunable dye lasers operating in the NIR spectrum.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer due to its ability to absorb light and generate reactive oxygen species for targeted cancer treatments.
• Non-Linear Optical Materials: A component in the research and production of materials for non-linear optics, including optical limiters and switches.
• Analytical Reagent: Serves as a specialized staining agent or tag in analytical chemistry and histology for NIR detection methods.

Basic Information

Product Name	3-Ethyl-2-[5-(3-Ethyl-3H-Naphtho[2,1-D]Thiazol-2-Ylidene)-Penta-1,3-Dienyl]-Naphtho[2,1-D]Thiazolium Chloride
CAS No.	26190-44-3
Molecular Formula	C₃₃H₂₉ClN₂S₂
Molecular Weight	553.18 g/mol
Synonyms	IR-780 iodide analog (chloride salt); Heptamethine cyanine dye chloride; 3-Ethyl-2-[5-(3-ethylbenzothiazolylidene)-1,3-pentadienyl]benzothiazolium chloride (common naming variation); Naphtho[2,1-d]thiazolium, 3-ethyl-2-[5-(3-ethyl-3H-naphtho[2,1-d]thiazol-2-ylidene)-1,3-pentadien-1-yl]-, chloride; NK-2014 (potential research code); Cy7.5 type dye chloride; NIR-797 related compound; 2-[5-(3-Ethyl-1,3-benzothiazol-2-ylidene)penta-1,3-dien-1-yl]-3-ethyl-1,3-benzothiazol-3-ium chloride (alternative IUPAC-style)
EINECS	Contact for details

Quality Control

Our production of 3-Ethyl-2-[5-(3-Ethyl-3H-Naphtho[2,1-D]Thiazol-2-Ylidene)-Penta-1,3-Dienyl]-Naphtho[2,1-D]Thiazolium Chloride adheres to stringent in-process controls and final batch testing to ensure consistent purity and performance. Each lot is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry. Certificates of Analysis (COA) detailing identity, purity, and impurity profiles are provided to guarantee the material meets your specific research or manufacturing 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 product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept sealed in a desiccated environment and handled under low-light conditions to maintain stability and prevent decomposition.

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	≤ 1.0%
Absorption Max (λmax)	780 - 800 nm (in suitable solvent)

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