Description

(5E)-3-Ethyl-2-[(E)-(3-Ethylbenzooxazol-2-Ylidene)Methyl]-5-(3-Methylbenzothiazol-2-Ylidene)-1-Thia-3-Azoniacyclopent-2-En-4-One Acetate is a specialized cationic cyanine dye salt, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is critical for applications requiring precise light absorption and emission in the NIR spectrum, offering high molar absorptivity and photostability. It is primarily needed by manufacturers and researchers in the fields of optical data storage, biomedical imaging, and advanced materials science.

Application

• Optical Data Storage Media: As a key light-absorbing component in recordable (R) and rewritable (RW) CD, DVD, and Blu-ray discs.
• Bioimaging & Diagnostics: Used as a fluorescent probe or tag in NIR fluorescence microscopy and in-vivo imaging due to its tissue-penetrating emission wavelengths.
• Laser Technology: Employed as a saturable absorber or gain medium in tunable dye lasers operating in the NIR region.
• Photodynamic Therapy (PDT): Investigated as a potential photosensitizer for targeted cancer treatments.
• Non-Linear Optics (NLO): A candidate material for applications in optical limiting, switching, and frequency conversion.
• Security Inks & Dyes: Utilized in anti-counterfeiting inks for banknotes and high-value products due to its specific spectral signature.
• Solar Energy: Research into its use in dye-sensitized solar cells (DSSCs) for light harvesting.
• Analytical Chemistry: As a sensitizing agent in spectroscopic methods and chemical sensors.

Basic Information

Item	Details
Product Name	(5E)-3-Ethyl-2-[(E)-(3-Ethylbenzooxazol-2-Ylidene)Methyl]-5-(3-Methylbenzothiazol-2-Ylidene)-1-Thia-3-Azoniacyclopent-2-En-4-One Acetate
CAS No.	142307-40-2
Molecular Formula	C26H25N3O3S2
Molecular Weight	491.62 g/mol
Synonyms	NK-2016; Cyanine dye NK-2016; 2-[2-[3-Ethyl-2(3H)-benzoxazolylidene)ethylidene]-3-methyl-1-thia-3-azoniacyclopent-2-en-4-one, acetate; 3-Ethyl-2-[(E)-(3-ethylbenzooxazol-2-ylidene)methyl]-5-(3-methylbenzothiazol-2-ylidene)-1-thia-3-azoniacyclopent-2-en-4-one acetate; NK2016; NIR Cyanine Dye Acetate Salt; Heptamethine cyanine dye derivative
EINECS	Contact for details

Quality Control

Our production of this high-purity specialty dye adheres to strict quality protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for absorption/emission verification, and residual solvent analysis. A detailed Certificate of Analysis (COA) providing batch-specific data is supplied with each shipment to ensure traceability and performance consistency for your critical applications.

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) and light-sensitive; prolonged exposure to air, moisture, or light may affect its spectral properties and stability. Keep the container tightly sealed in a desiccated environment after each use.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
λmax (Absorption)	760 - 780 nm (in suitable solvent)
Water Content (KF)	≤ 1.0%
Residual Solvents (GC)	Meets ICH guidelines
Heavy Metals	≤ 20 ppm

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