Description

1-Ethyl-2-[[3-(3-Sulphonatobutyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium is a specialized, high-value organic dye intermediate and functional chemical compound. This product is critical for applications requiring precise light absorption and emission properties, particularly in advanced material science and diagnostics. It is primarily sought by manufacturers in the photographic, optical, and biomedical sensor industries for its role as a key precursor in synthesizing cyanine dyes and other functional chromophores.

Application

• Cyanine Dye Synthesis: A crucial intermediate for manufacturing near-infrared (NIR) and infrared (IR) fluorescent cyanine dyes used in bioimaging and medical diagnostics.
• Optical Data Storage: Used in the formulation of recording layers for optical discs and other advanced data storage media.
• Photographic Sensitizers: Acts as a spectral sensitizer in silver halide photographic emulsions to extend sensitivity into specific wavelength ranges.
• Laser Dye Precursor: Serves as a building block for dyes used in tunable dye lasers and other photonic devices.
• Non-Linear Optical Materials: A component in the development of materials for photonics and optoelectronics due to its conjugated structure.
• Bioconjugation & Labeling: Functionalized for attaching fluorescent labels to antibodies, proteins, and nucleic acids in assay development.
• Sensor Technology: Employed in the fabrication of chemical sensors and biosensors that rely on fluorescence detection.
• Research & Development: Used in academic and industrial R&D for exploring new functional dyes and advanced material properties.

Basic Information

Product Name	1-Ethyl-2-[[3-(3-Sulphonatobutyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium
CAS No.	29637-13-6
Molecular Formula	C23H25N2O3S2+
Molecular Weight	441.58 g/mol
Synonyms	1-Ethyl-2-[(3-sulfobutyl)-2(3H)-benzothiazolylidene)methyl]quinolinium; Quinolinium, 1-ethyl-2-[(3-sulfobutyl)-2(3H)-benzothiazolylidene)methyl]-; 1-Ethyl-2-[(3-sulfobutyl)benzothiazolin-2-ylidene)methyl]quinolinium; Cyanine dye intermediate IR-125 precursor; Sulfo-butyl benzothiazolyl quinolinium compound; 2-[2-[3-(3-Sulfopropyl)-2(3H)-benzothiazolylidene]ethylidene]-1-ethylquinolinium (related structure); NIR dye intermediate
EINECS	Contact for details

Quality Control

Our production of 1-Ethyl-2-[[3-(3-Sulphonatobutyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for sensitive applications. Each lot is characterized using advanced analytical techniques including HPLC, NMR, and mass spectrometry. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory needs.

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 (moisture-sensitive) nature, the container must be kept tightly sealed in a dry environment to prevent degradation. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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