Description

3-Ethyl-2-[3-(3-Ethyl-5-Methyl-3H-Benzothiazol-2-Ylidene)-2-Methylprop-1-Enyl]-5-Methylbenzothiazolium Iodide is a high-purity, near-infrared absorbing cyanine dye salt. This compound matters for its exceptional photostability and sharp absorption profile, making it a critical functional material in advanced optical applications. It is primarily needed by manufacturers and R&D facilities in the photonics, optical data storage, and laser technology sectors.

Application

• Optical Data Storage Media: As a key dye component in recordable CD-R and DVD-R discs.
• Laser Technology: As a saturable absorber or gain medium in tunable dye lasers operating in specific near-infrared wavelengths.
• Non-linear Optics (NLO): For research and development of materials with specific electro-optical properties.
• Photodynamic Therapy (PDT) Research: As a potential photosensitizer in biomedical research applications.
• Chemical Sensors: Utilized in the development of optical sensors for pH, ions, or specific analytes due to its chromogenic properties.
• Security Inks & Dyes: For anti-counterfeiting applications in currency, documents, and high-value goods.

Basic Information

Product Name	3-Ethyl-2-[3-(3-Ethyl-5-Methyl-3H-Benzothiazol-2-Ylidene)-2-Methylprop-1-Enyl]-5-Methylbenzothiazolium Iodide
CAS No.	42165-79-7
Molecular Formula	C25H27IN2S2
Molecular Weight	546.52 g/mol
Synonyms	DTTC Iodide; 3,3'-Diethylthiadicarbocyanine Iodide; 1,3,3,1',3',3'-Hexamethylindotricarbocyanine Iodide (common misnomer for related structure); DTTCI; Diethylthiatricarbocyanine Iodide; NK-3194; HITCI Iodide (historical reference); Near-IR Cyanine Dye
EINECS	Contact for details

Quality Control

Our 3-Ethyl-2-[3-(3-Ethyl-5-Methyl-3H-Benzothiazol-2-Ylidene)-2-Methylprop-1-Enyl]-5-Methylbenzothiazolium Iodide is produced under strict quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure it meets the stringent requirements of optical and electronic material applications. Certificates of Analysis (COA) with detailed chromatographic and spectral data are provided to guarantee traceability and batch-to-batch consistency.

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; therefore, containers must be kept sealed under an inert atmosphere (e.g., nitrogen or argon) when not in use to prevent degradation and moisture absorption. Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
λmax (Absorption Maximum)	760 - 780 nm (in methanol)
Extinction Coefficient (ε)	≥ 2.0 x 105 L·mol-1·cm-1
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.5%

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