Description

1-Ethyl-6-Methyl-2-[[5-Methyl-3-(3-Sulphonatopropyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium is a high-purity, functionalized cyanine dye intermediate with a sulfonate group for enhanced water solubility. This compound is valued for its strong light-absorbing and fluorescent properties, making it a critical component in the synthesis of advanced functional dyes and biological stains. It is primarily sought by manufacturers in the biotechnology, diagnostic imaging, and specialty chemical sectors for developing sensitive detection reagents and photostable markers.

Application

• Fluorescent Probe Synthesis: A key precursor for creating near-infrared (NIR) fluorescent dyes used in bioimaging and diagnostic assays.
• Biological Staining: Used in the formulation of stains for nucleic acid (DNA/RNA) detection and protein labeling in gel electrophoresis and microscopy.
• Photodynamic Therapy (PDT) Agents: Serves as a building block for photosensitizers in medical research for targeted cancer therapies.
• Laser Dye Intermediate: Employed in the production of tunable laser dyes for scientific and industrial laser systems.
• Optical Sensor Development: Integral in manufacturing chemical sensors and indicators that respond to specific ions or pH changes.
• Non-linear Optical Materials: Used in research for developing materials with specific light-modulating properties for photonic applications.

Basic Information

Product Name	1-Ethyl-6-Methyl-2-[[5-Methyl-3-(3-Sulphonatopropyl)-3H-Benzothiazol-2-Ylidene]Methyl]Quinolinium
CAS No.	35501-73-6
Molecular Formula	C24H27N2O3S2+ • X-
Molecular Weight	455.61 g/mol (for cation)
Synonyms	Cy5 amine sulfonate; 1-Ethyl-6-methyl-2-((5-methyl-3-(3-sulfonatopropyl)benzothiazol-2(3H)-ylidene)methyl)quinolin-1-ium; Quinolinium, 1-ethyl-6-methyl-2-[[5-methyl-3-(3-sulfonatopropyl)-2(3H)-benzothiazolylidene]methyl]-, inner salt; Cyanine dye sulfonate derivative; Benzothiazolium quinolinium dye intermediate; Water-soluble cyanine dye precursor; NIR dye intermediate CAS 35501-73-6
EINECS	Contact for details

Quality Control

Every batch of this cyanine dye intermediate is produced under strict quality management systems. We employ advanced analytical techniques including HPLC, NMR, and mass spectrometry to verify structural identity and purity, ensuring consistency for sensitive downstream synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and spectral data is provided with each shipment to support your quality assurance and regulatory documentation.

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 kept tightly sealed in a low-humidity environment to prevent degradation. For long-term storage, consider using desiccants.

Specification

Item	Specification
Appearance	Dark green to blue-black solid
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Purity (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Residue on Ignition	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Freely soluble

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