Description

2-[3-[5,6-Dichloro-1-Ethyl-1,3-Dihydro-3-(4-Sulphonatobutyl)-2H-Benzimidazol-2-Ylidene]Prop-1-Enyl]-3-Ethyl-5-Phenylbenzoxazolium 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 engineered for applications requiring precise photophysical characteristics and excellent water solubility due to its sulphonated side chain. It is a critical component for researchers and manufacturers in the biotechnology, medical diagnostics, and advanced material science sectors.

Application

• NIR Fluorescent Probes and Labels: Used as a key chromophore in the synthesis of fluorescent dyes for bio-imaging, flow cytometry, and in vivo diagnostics.
• Optical Data Storage: Serves as a light-absorbing material in the development of advanced optical recording media.
• Laser Dyes and Photonic Materials: Employed in the formulation of tunable dye lasers and non-linear optical (NLO) materials due to its specific absorption/emission profile.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer or a building block for targeted therapeutic agents.
• Sensor Development: Utilized in the creation of chemical and biological sensors that rely on fluorescence quenching or enhancement.
• Industrial Colorants: Applied in specialized niche areas requiring NIR-absorbing pigments or dyes.

Basic Information

Product Name	2-[3-[5,6-Dichloro-1-Ethyl-1,3-Dihydro-3-(4-Sulphonatobutyl)-2H-Benzimidazol-2-Ylidene]Prop-1-Enyl]-3-Ethyl-5-Phenylbenzoxazolium
CAS No.	50671-46-0
Molecular Formula	C₃₃H₃₄Cl₂N₃O₄S
Molecular Weight	639.61 g/mol
Synonyms	IR-786; IR 786; IR786; 1-Ethyl-2-[3-(1-ethyl-3,3-dimethyl-5-sulfonatoindolin-2-ylidene)propenyl]-3,3-dimethyl-3H-indolium-5-sulfonate (related structure); Benzimidazolium, 2-[3-[5,6-dichloro-1-ethyl-1,3-dihydro-3-(4-sulfonatobutyl)-2H-benzimidazol-2-ylidene]-1-propenyl]-3-ethyl-5-phenyl-, inner salt; Cyanine dye IR-786; NIR dye 786; Heptamethine cyanine dye with sulphonate group.
EINECS	Contact for details

Quality Control

Every batch of this cyanine dye is produced and tested under a strict quality management system to ensure consistency in its critical photophysical properties. We provide comprehensive Certificates of Analysis (COA) detailing purity, identity, and key spectral data (e.g., absorbance/fluorescence maxima, extinction coefficient). Our production adheres to cGMP guidelines where applicable, supporting its use in research and diagnostic 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). The product is light-sensitive and should be handled under appropriate conditions to prevent degradation.

Specification

Item	Specification
Appearance	Dark green to blue-black powder
Identification (HPLC)	Conforms to reference standard
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
λmax (Absorption)	780 - 790 nm (in methanol)
Extinction Coefficient (ε)	≥ 200,000 L·mol⁻¹·cm⁻¹
Water Content (KF)	≤ 5.0 %
Residue on Ignition	≤ 1.0 %

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