Description

Benzothiazolium, 3-Ethyl-2-3-(3-Ethyl-2(3H)-Benzothiazolylidene)-1,3-Difluoro-1-Propenyl-, Iodide is a specialized cyanine dye salt, a member of the benzothiazolium class, valued for its distinct photophysical properties. This compound is a critical intermediate and functional material for advanced research and industrial applications requiring specific light absorption and emission characteristics. It is primarily sought by manufacturers and researchers in the photographic, optical data storage, and dye laser industries, as well as for use in organic electronics and as a biological stain.

Application

• Sensitizing Dye for Silver Halide Photography: Used to extend the spectral sensitivity of photographic emulsions into specific wavelength regions.
• Optical Data Storage Media: Acts as a key component in the recording layer of writable CDs and DVDs (e.g., CD-R).
• Laser Dyes: Employed as an active medium in tunable dye lasers for scientific and medical applications.
• Non-Linear Optical (NLO) Materials: Investigated for use in photonic devices due to its molecular structure and electronic properties.
• Biological Staining and Fluorescence Probes: Used in histology and bio-imaging for selective staining of cellular components.
• Organic Semiconductor Research: Serves as a building block or dopant in the development of organic light-emitting diodes (OLEDs) and photovoltaic cells.

Basic Information

Product Name	Benzothiazolium, 3-Ethyl-2-3-(3-Ethyl-2(3H)-Benzothiazolylidene)-1,3-Difluoro-1-Propenyl-, Iodide
CAS No.	442-74-0
Molecular Formula	C₂₂H₂₁F₂IN₂S
Molecular Weight	510.28 g/mol
Synonyms	3-Ethyl-2-[3-(3-ethyl-2(3H)-benzothiazolylidene)-1,3-difluoro-1-propenyl]benzothiazolium iodide; 2-[3-(3-Ethyl-2(3H)-benzothiazolylidene)-1,3-difluoro-1-propenyl]-3-ethylbenzothiazolium iodide; Dye for CD-R; Cyanine dye 442-74-0; Benzothiazolium cyanine dye; 1,3-Difluoro-1-propenyl benzothiazolium salt
EINECS	Contact for details

Quality Control

Our production of this cyanine dye adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Every lot is characterized using advanced analytical techniques including HPLC for purity, UV-Vis spectroscopy for absorbance profile verification, and NMR for structural confirmation. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and relevant physical properties is provided with each shipment to support your quality assurance and R&D processes.

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 light-sensitive and should be handled under subdued lighting conditions to prevent degradation. Keep the container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (UV-Vis)	Conforms to reference spectrum
Purity (HPLC)	≥ 95.0% (Area %)
Loss on Drying	≤ 2.0 %
Residue on Ignition	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm

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