Description

2-[2-[(4-Ethoxyphenyl)Amino]Vinyl]-1,3,3-Trimethyl-3H-Indolium Hydrogen Sulphate is a specialized cationic dye intermediate belonging to the cyanine dye family. This compound matters for its role as a key precursor in synthesizing advanced functional dyes and pigments with specific optical properties. Industrial buyers in the photographic, laser, and optical data storage media sectors require it for producing materials with precise light absorption and emission characteristics.

Application

• Cyanine Dye Synthesis: Primary intermediate for manufacturing heptamethine cyanine dyes used in photographic sensitizers and infrared-absorbing materials.
• Optical Data Storage: Key component in the production of dyes for recordable CD-R and DVD-R media.
• Laser Technology: Used in the formulation of saturable absorbers and laser dyes for specific wavelength applications.
• Biomedical Imaging: Serves as a building block for near-infrared (NIR) fluorescent probes and labels used in bioassays and diagnostic imaging.
• Photodynamic Therapy (PDT): Potential precursor for photosensitizers used in certain therapeutic applications.
• Non-linear Optics (NLO): Utilized in research and development of materials for optical limiting and switching devices.
• Textile Dyeing: Intermediate for specialized synthetic dyes applied to technical textiles requiring specific color fastness.
• Analytical Chemistry: May be employed as a staining agent or indicator in specific chromatographic or spectroscopic methods.

Basic Information

Product Name	2-[2-[(4-Ethoxyphenyl)Amino]Vinyl]-1,3,3-Trimethyl-3H-Indolium Hydrogen Sulphate
CAS No.	70353-84-3
Molecular Formula	C21H26N2O5S
Molecular Weight	418.51 g/mol
Synonyms	1,3,3-Trimethyl-2-[2-[(4-ethoxyphenyl)amino]ethenyl]-3H-indolium hydrogen sulfate; 2-[2-(4-Ethoxyanilino)vinyl]-1,3,3-trimethyl-3H-indolium hydrogen sulfate; Cyanine dye intermediate; Heptamethine cyanine dye precursor; Indolium salt dye intermediate; 4-Ethoxy anilino vinyl indolium salt; NK 2016 (potential research code); Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality protocols to ensure batch-to-batch consistency and purity required for sensitive optical applications. Quality is verified through comprehensive analytical methods including HPLC, NMR, and spectrophotometry. A detailed Certificate of Analysis (COA) documenting identity, purity, and impurity profile 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, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed under anhydrous conditions to prevent degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark green to brown crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 95.0% (Area %)
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Specific Absorbance	Contact for details

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