Description

2-[3-(3-Ethyl-3H-Benzothiazol-2-Ylidene)Isobut-1-Enyl]-3-(3-Sulphonatopropyl)Benzothiazolium is a specialized benzothiazolium dye intermediate, recognized for its distinct chromophoric properties and water-solubility imparted by the sulphonatopropyl group. This compound matters for its role as a key precursor in the synthesis of near-infrared (NIR) absorbing cyanine dyes, which are critical for advanced optical applications. Industrial and research clients in the fields of bioimaging, optical data storage, laser technology, and photodynamic therapy require this high-purity chemical for developing next-generation functional materials.

Application

• Cyanine Dye Synthesis: A crucial building block for manufacturing NIR-absorbing heptamethine cyanine dyes used in bio-conjugation and labeling.
• Biomedical Imaging: Serves as a precursor for fluorescent probes and contrast agents in in vivo and in vitro diagnostic imaging.
• Optical Recording Media: Used in the development of dyes for high-density optical data storage disks (e.g., CD-R, DVD-R).
• Laser Applications: A component in the formulation of gain media for tunable dye lasers operating in specific wavelength ranges.
• Photodynamic Therapy (PDT): Intermediate for photosensitizers designed to target and destroy abnormal cells upon light activation.
• Non-Linear Optics (NLO): Research into materials with specific electronic properties for optical limiting and switching.
• Sensor Technology: Development of chemical sensors and biosensors that rely on fluorescence or colorimetric changes.

Basic Information

Item	Details
Product Name	2-[3-(3-Ethyl-3H-Benzothiazol-2-Ylidene)Isobut-1-Enyl]-3-(3-Sulphonatopropyl)Benzothiazolium
CAS No.	53035-42-0
Molecular Formula	C25H28N2O3S3+ • Counterion-
Molecular Weight	Approx. 500.7 g/mol (for cation)
Synonyms	2-[3-(3-Ethylbenzothiazol-2(3H)-ylidene)-1-methylprop-1-en-1-yl]-3-(3-sulfonatopropyl)benzothiazol-3-ium; Benzothiazolium, 2-[3-(3-ethyl-2(3H)-benzothiazolylidene)-1-methyl-1-propenyl]-3-(3-sulfopropyl)-, inner salt; Cyanine dye intermediate; NIR dye precursor; Heptamethine cyanine dye intermediate; Sulfo-cyanine dye building block; 3H-Benzothiazolium, 2-[3-(3-ethyl-3H-benzothiazol-2-ylidene)-1-methyl-1-propenyl]-3-(3-sulfopropyl)-, inner salt
EINECS	Contact for details

Quality Control

Our production of this advanced intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and high purity, essential for sensitive optical applications. Quality is verified through analytical techniques including HPLC, NMR, and mass spectrometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your R&D and manufacturing quality assurance.

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-green powder or crystals
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 95.0% (Area %)
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.