Description

1-Ethyl-2-[[3-(4-Sulphonatobutyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium is a high-purity, functionalized cyanine dye intermediate with a CAS number of 63912-44-7. This compound is valued for its strong light-absorbing properties and water-solubility imparted by the sulphonatobutyl group, making it a critical component in advanced material synthesis. It is primarily sought after by manufacturers in the photographic, optical data storage, and biomedical imaging sectors for developing specialized dyes and sensors.

Application

• Photosensitizer and Dye Intermediate: A key building block for synthesizing cyanine and merocyanine dyes used in photographic emulsions and optical recording media (e.g., CD-R, DVD-R).
• Biomedical Imaging Probes: Used in the development of near-infrared (NIR) fluorescent labels and contrast agents for in vitro diagnostics and bioimaging applications.
• Laser and Nonlinear Optical Materials: Incorporated into organic materials for laser dyes and components requiring specific light absorption and emission characteristics.
• Textile and Specialty Dyes: Serves as a precursor for high-performance, water-soluble dyes used in niche technical textiles and ink formulations.
• Analytical Chemistry Reagents: Employed in the synthesis of chromogenic and fluorogenic reagents for sensitive detection assays in chemical analysis.

Basic Information

Product Name	1-Ethyl-2-[[3-(4-Sulphonatobutyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium
CAS No.	63912-44-7
Molecular Formula	C23H25N2O3S2+ • X-
Molecular Weight	Approx. 441.58 g/mol (cation)
Synonyms	1-Ethyl-2-[(3-sulfobutyl-2(3H)-benzothiazolylidene)methyl]quinolinium; Quinolinium, 1-ethyl-2-[[3-(4-sulfobutyl)-2(3H)-benzothiazolylidene]methyl]-, inner salt; Cyanine dye intermediate; Benzothiazolium quinoline dye; Sulfobutyl cyanine dye precursor; 2-[(1-Ethyl-2(1H)-quinolinylidene)methyl]-3-(4-sulfobutyl)-1,3-benzothiazolium
EINECS	Contact for details

Quality Control

Our production of this cyanine dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high chemical purity. 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 or solid
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% Any single unknown impurity ≤ 1.0%

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