Description

5-Chloro-2-[2-[(5-Chloro-3-Ethyl-3H-Benzothiazol-2-Ylidene)Methyl]But-1-Enyl]-3-Ethylbenzothiazolium Bromide is a high-purity, specialized organic salt belonging to the benzothiazolium dye class. This compound is valued for its strong light-absorbing and photosensitizing properties, making it a critical intermediate in advanced material synthesis. It is primarily sought by manufacturers in the photographic, optical, and specialty dye industries for applications requiring precise spectral characteristics.

Application

• Photosensitizer and Spectral Sensitizer in silver halide photographic films and plates.
• Key Intermediate for synthesizing cyanine and polymethine dyes used in optical recording media.
• Laser Dye Precursor for the development of tunable dye lasers and non-linear optical materials.
• Biomedical Staining Agent in the preparation of specialized histological stains for microscopy.
• Optical Filter Component in the manufacturing of light filters and anti-counterfeiting inks.
• Research & Development of novel organic semiconductors and photoconductive materials.

Basic Information

Product Name	5-Chloro-2-[2-[(5-Chloro-3-Ethyl-3H-Benzothiazol-2-Ylidene)Methyl]But-1-Enyl]-3-Ethylbenzothiazolium Bromide
CAS No.	18426-56-7
Molecular Formula	C₂₂H₂₁BrCl₂N₂S₂
Molecular Weight	528.35 g/mol
Synonyms	3-Ethyl-5-chloro-2-[(1E,3E)-1-(3-ethyl-5-chloro-2(3H)-benzothiazolylidene)-3-methyl-1,3-butadienyl]benzothiazolium Bromide; 5-Chloro-2-[2-[(5-chloro-3-ethyl-2(3H)-benzothiazolylidene)methyl]-1-butenyl]-3-ethylbenzothiazolium Bromide; Dye Intermediate 18426-56-7; Cyanine Dye Intermediate; Benzothiazolium, 5-chloro-2-[2-[(5-chloro-3-ethyl-2(3H)-benzothiazolylidene)methyl]-1-butenyl]-3-ethyl-, bromide; Sensitizing Dye 18426-56-7
EINECS	Contact for details

Quality Control

Our production of this specialty chemical adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. A Certificate of Analysis (COA) detailing all specifications 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, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark green to black crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.