Description

Hydrogen 5-Methyl-2-[2-[[5-Methyl-3-(3-Sulphonatopropyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-3-(3-Sulphonatopropyl)Benzothiazolium is a high-purity, water-soluble cyanine dye intermediate, also known as a benzothiazolium salt. This compound is valued for its strong near-infrared (NIR) absorption and fluorescence properties, making it a critical component for advanced optical applications. It is primarily sought after by manufacturers in the biotechnology, medical diagnostics, and specialty chemical synthesis sectors for developing sensitive detection systems and functional materials.

Application

• Fluorescent Labeling Probes: Key intermediate for synthesizing NIR fluorescent dyes used in bioimaging, flow cytometry, and immunoassays.
• Optical Sensor Development: Used in the production of chemical sensors and biosensors for environmental monitoring and medical diagnostics.
• Photodynamic Therapy (PDT) Agents: Serves as a precursor for photosensitizers in cancer treatment research.
• Laser Dye and Optical Recording Media: A component in the formulation of dyes for tunable lasers and high-density optical data storage.
• Non-Linear Optical Materials: Used in research and development of materials for photonics and telecommunications.
• Analytical Reagent: Employed as a staining agent or tracer in various chromatographic and electrophoretic techniques.

Basic Information

Product Name	Hydrogen 5-Methyl-2-[2-[[5-Methyl-3-(3-Sulphonatopropyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]-3-(3-Sulphonatopropyl)Benzothiazolium
CAS No.	23368-55-0
Molecular Formula	C31H37N2O6S3+ • X-
Molecular Weight	~629.82 g/mol (for cation)
Synonyms	IR-780 iodide analogue (sulfonated); 3H-Benzothiazolium, 2-[2-[(1E)-1-buten-1-yl]-4-[3-sulfopropyl]-3H-benzothiazol-3-ylidene]methyl]-5-methyl-3-(3-sulfopropyl)-, inner salt; Sulfonated Cyanine Dye Intermediate; NIR Cyanine Dye Salt; Benzothiazolium, 2-[2-[(1E)-1-butenyl]-4-(3-sulfopropyl)-3H-benzothiazol-3-ylidene]methyl]-5-methyl-3-(3-sulfopropyl)-, hydroxide, inner salt; 2-[2-[(1E)-1-Butenyl]-4-(3-sulfopropyl)-3H-benzothiazol-3-ylidene]methyl]-5-methyl-3-(3-sulfopropyl)benzothiazolium hydroxide inner salt; CAS 23368-55-0.
EINECS	Contact for details

Quality Control

Our production of this cyanine dye intermediate adheres to stringent ISO 9001 quality management standards. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation (IR, NMR), to ensure consistency and performance. A detailed Certificate of Analysis (COA) documenting purity, absorbance maxima, and other critical parameters is provided with each shipment to guarantee it meets your specific R&D 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); the container must be kept tightly sealed in a dry environment to prevent degradation. For long-term storage, consider desiccants or an inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-black powder or crystals
Identification (IR)	Conforms to structure
Identification (HPLC)	Main peak retention time matches reference
Purity (HPLC)	≥ 95.0% (Standard Grade)
Water Content (KF)	≤ 5.0%
Absorbance Maxima (λmax)	~780 nm ± 5 nm (in suitable solvent)
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.