Description

2-((E)-2-(2-CHLORO-3-[(E)-2-(1,3,3-TRIMETHYL-1,3-DIHYDRO-2H-BENZO[G]INDOL-2-YLIDENE)ETHYLIDENE]-1-CYCLOHEXEN-1-YL)ETHENYL)-1,3,3-TRIMETHYL-3H-BENZO[G]INDOLIUM 4-METHYLBENZENESULFONATE is a high-purity, functional organic salt belonging to the cyanine dye family, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is critical for applications requiring precise light absorption and emission characteristics in advanced technological fields. It is primarily sought by manufacturers and research institutions in the optical data storage, laser technology, biomedical imaging, and non-linear optics sectors.

Application

• Optical Data Storage Media: As a key light-absorbing component in recordable (CD-R, DVD-R) and high-density optical storage disks.
• Laser Dyes & Optical Filters: Used in the formulation of tunable dye lasers and the production of specific optical filters due to its sharp absorption profile.
• Biomedical Imaging & Photodynamic Therapy (PDT): Serves as a potential photosensitizer or fluorescent probe for diagnostic imaging and targeted light-activated therapies.
• Non-Linear Optical (NLO) Materials: A candidate chromophore for developing advanced materials used in optical switching, modulation, and frequency conversion devices.
• Security Inks & Anti-Counterfeiting: Utilized in specialized inks for currency, documents, and high-value products due to its unique spectral properties under specific light.
• Semiconductor & Photovoltaic Research: Investigated for use in organic light-emitting diodes (OLEDs), solar cells, and other optoelectronic devices.

Basic Information

Item	Details
Product Name	2-((E)-2-(2-CHLORO-3-[(E)-2-(1,3,3-TRIMETHYL-1,3-DIHYDRO-2H-BENZO[G]INDOL-2-YLIDENE)ETHYLIDENE]-1-CYCLOHEXEN-1-YL)ETHENYL)-1,3,3-TRIMETHYL-3H-BENZO[G]INDOLIUM 4-METHYLBENZENESULFONATE
CAS No.	309967-80-4
Molecular Formula	C46H46ClN2O3S
Molecular Weight	742.37 g/mol
Synonyms	Cy5.5 tosylate; Heptamethine cyanine dye tosylate salt; 2-[2-[2-Chloro-3-[(1,3-dihydro-1,3,3-trimethyl-2H-benz[e]indol-2-ylidene)ethylidene]-1-cyclohexen-1-yl]ethenyl]-1,3,3-trimethyl-1H-benz[e]indolium 4-methylbenzenesulfonate; IR-786 tosylate analog; NIR cyanine dye; Benzo[g]indolium dye salt; CAS 309967-80-4
EINECS	Contact for details

Quality Control

Our production of this specialty 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, NMR, and mass spectrometry to confirm identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing spectral properties (λmax, ε), purity, and other relevant specifications is provided with each shipment.

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 light or in amber glass containers to prevent photodegradation. Keep the container tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	Dark green to blue-black crystalline powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Retention time matches reference standard
Purity (HPLC)	≥ 97.0% (Area %)
Absorption λmax	Contact for details
Extinction Coefficient (ε)	Contact for details
Water Content (KF)	≤ 2.0 %
Residue on Ignition	≤ 0.5 %

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