Description

2-[2-[2,3-dihydro-5-methyl-3-oxo-2-phenyl-1-(4-sulphonatobutyl)-1H-pyrazol-4-yl]-3-(6-methoxy-3-methyl-3H-benzothiazol-2-ylidene)prop-1-enyl]-6-methoxy-3-methylbenzothiazolium is a high-purity, water-soluble cyanine dye derivative, recognized for its excellent photostability and strong absorption in the visible to near-infrared spectrum. This compound is a critical functional material valued for its ability to act as a highly sensitive and selective fluorescent probe or photosensitizer. It is primarily sought after by manufacturers and research institutions in the biotechnology, analytical chemistry, and advanced materials sectors for demanding applications.

Application

• Fluorescent Labeling and Staining: Used as a covalent or non-covalent label for biomolecules (proteins, nucleic acids) in fluorescence microscopy, flow cytometry, and diagnostic assays.
• Optical Sensing Probes: Employed in the development of chemical and biological sensors for detecting ions, gases, or specific analytes due to its environment-sensitive fluorescence.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer for cancer treatment, where it generates reactive oxygen species upon light activation.
• Laser Dyes and Optical Materials: Utilized in the formulation of tunable dye lasers and as an active component in nonlinear optical materials and devices.
• Photographic Sensitizers: Functions as a spectral sensitizer in silver halide photographic emulsions to extend sensitivity into specific wavelength ranges.
• Solar Cell Research: Applied in dye-sensitized solar cells (DSSCs) as a light-harvesting component to improve photon-to-electron conversion efficiency.

Basic Information

Item	Details
Product Name	2-[2-[2,3-dihydro-5-methyl-3-oxo-2-phenyl-1-(4-sulphonatobutyl)-1H-pyrazol-4-yl]-3-(6-methoxy-3-methyl-3H-benzothiazol-2-ylidene)prop-1-enyl]-6-methoxy-3-methylbenzothiazolium
CAS No.	2321-65-5
Molecular Formula	C39H39N4O7S3+ • X-
Molecular Weight	~771.94 g/mol (cation)
Synonyms	Pyrazolone Cyanine Dye; Benzothiazolium, 2-[2-[2,3-dihydro-5-methyl-3-oxo-2-phenyl-1-(4-sulfonatobutyl)-1H-pyrazol-4-yl]ethenyl]-6-methoxy-3-methyl-; Sensitizing Dye 2321-65-5; 1-(4-Sulfobutyl)-3,3-dimethyl-2-[2-[2,3-dihydro-5-methyl-3-oxo-2-phenyl-1-(4-sulfonatobutyl)-1H-pyrazol-4-yl]ethenyl]indolium (related structure); Water-soluble cyanine dye; Photographic sensitizer dye; Fluorescent cyanine dye derivative.
EINECS	Contact for details

Quality Control

Our production of this advanced functional dye adheres to strict quality management protocols. Every batch is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry to ensure structural integrity and purity. A comprehensive Certificate of Analysis (COA) is provided with each shipment, detailing key parameters such as assay, absorbance/fluorescence profile, and impurity levels. We support custom synthesis and purification to meet specific research or commercial grade 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 material is hygroscopic (moisture-sensitive); ensure the container is sealed tightly after each use to prevent degradation from atmospheric moisture. 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)	Retention time matches reference standard
Assay (HPLC)	≥ 95.0%
λ max (Absorption)	Specified range provided per grade (typically 600-750 nm in suitable solvent)
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.