Description

3-Ethyl-2-[2-[[3-(2-Hydroxy-3-Sulphonatopropyl)-5-Methyl-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-5,6-Dimethylbenzothiazolium is a high-purity, functionalized benzothiazolium dye intermediate. This compound is valued for its specific chromophoric structure, making it a critical precursor for synthesizing advanced functional dyes and optical materials. It is primarily sought by manufacturers in the specialty chemicals sector, particularly for applications in laser dyes, non-linear optical (NLO) materials, and as a sensitizer in photographic and imaging technologies.

Application

• Laser Dye Precursor: Serves as a key intermediate for the synthesis of near-infrared (NIR) absorbing and emitting cyanine dyes used in tunable dye lasers and medical diagnostics.
• Optical Material Synthesis: Used in the development of non-linear optical (NLO) materials for photonics, optical switching, and frequency conversion devices.
• Photographic Sensitizer: Acts as a spectral sensitizer in silver halide photographic emulsions to extend sensitivity into specific wavelength regions.
• Biomedical Staining: Potential application as a building block for fluorescent probes and stains used in bioimaging and histology.
• Organic Semiconductor Research: Investigated as a component in the development of organic light-emitting diodes (OLEDs) and photovoltaic cells due to its conjugated system.
• Analytical Reagent: May be utilized in the formulation of colorimetric and fluorometric detection reagents for analytical chemistry.

Basic Information

Item	Details
Product Name	3-Ethyl-2-[2-[[3-(2-Hydroxy-3-Sulphonatopropyl)-5-Methyl-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-5,6-Dimethylbenzothiazolium
CAS No.	94158-28-8
Molecular Formula	C28H35N2O4S3+ • X-
Molecular Weight	~567.78 g/mol (for cation)
Synonyms	3-Ethyl-2-[(E)-2-[[3-(2-hydroxy-3-sulfonatopropyl)-5-methyl-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-5,6-dimethylbenzothiazolium; Sulfonated benzothiazolium cyanine dye intermediate; Cyanine dye derivative, sulfopropyl functionalized; 2-[2-[(3-Ethyl-5,6-dimethyl-2(3H)-benzothiazolylidene)methyl]-1-butenyl]-3-(2-hydroxy-3-sulfopropyl)-5-methylbenzothiazolium; Photosensitizer 94158-28-8; NK-2016 (potential research code)
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical techniques including HPLC, NMR, and mass spectrometry. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment to support your R&D and manufacturing quality systems.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to minimize exposure to atmospheric moisture. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	Dark green to brownish-green powder or crystals
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 95.0% (Area %)
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.