Description

3-(2-Hydroxyethyl)-2-[3-[3-(2-Hydroxyethyl)-3H-Benzothiazol-2-Ylidene]-2-Methylprop-1-Enyl]Benzothiazolium Bromide is a specialized cationic cyanine dye with significant photophysical properties. This compound is valued for its strong absorption and fluorescence characteristics in the visible to near-infrared spectrum, making it a critical functional material. It is primarily required by manufacturers and research institutions in the fields of optical recording media, laser dyes, biological staining, and advanced material science.

Application

• Optical Data Storage: A key photosensitizer and recording medium component for CD-R, DVD-R, and other write-once optical discs.
• Laser Technology: Used as a gain medium or saturable absorber in tunable dye lasers operating in specific wavelength ranges.
• Biomedical Staining & Imaging: Employed as a fluorescent probe for nucleic acid (DNA/RNA) detection, cell staining, and in vivo imaging applications.
• Photodynamic Therapy (PDT): Investigated as a potential photosensitizer for targeted cancer treatments due to its light-activated properties.
• Non-Linear Optics (NLO): A component in the development of materials for optical limiting, switching, and frequency conversion.
• Chemical Sensors: Utilized in the fabrication of fluorescence-based sensors for detecting specific ions or molecules.
• Solar Cells: Research into its use as a light-harvesting dye in dye-sensitized solar cells (DSSCs).
• Photopolymerization: Acts as a photoinitiator or co-initiator in UV-curable inks, coatings, and adhesives.

Basic Information

Product Name	3-(2-Hydroxyethyl)-2-[3-[3-(2-Hydroxyethyl)-3H-Benzothiazol-2-Ylidene]-2-Methylprop-1-Enyl]Benzothiazolium Bromide
CAS No.	52686-09-6
Molecular Formula	C23H25BrN2O2S2
Molecular Weight	505.49 g/mol
Synonyms	NK-201; NK 201; 3H-Benzothiazolium, 3-(2-hydroxyethyl)-2-[3-[3-(2-hydroxyethyl)-3H-benzothiazol-2-ylidene]-2-methyl-1-propen-1-yl]-, bromide; 3,3'-Di(2-hydroxyethyl)-5,5'-dimethylthiacyanine bromide; Thiazole Orange Dimer; TO-PRO-1 dye analog; Cyanine dye NK-201; 1-Propen-1-yl, 3H-benzothiazolium deriv.
EINECS	Contact for details

Quality Control

Our production of this high-purity cyanine dye adheres to stringent quality protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for absorbance/fluorescence verification, and elemental analysis. We provide detailed Certificates of Analysis (COA) with each shipment, ensuring traceability and compliance with your research or manufacturing specifications.

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 sealed in a desiccated environment to prevent moisture absorption, which can affect performance. For long-term stability, consider storage under an inert atmosphere such as argon or nitrogen.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 98.0% (Area Percent)
Water Content (KF)	≤ 1.0 %
Residue on Ignition	≤ 0.5 %
Absorption Max (λmax)	Contact for details
Fluorescence Max (λem)	Contact for details

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