Description

2-[3-[5,6-Dichloro-1-Ethyl-1,3-Dihydro-3-(3-Sulphonatobutyl)-2H-Benzimidazol-2-Ylidene]Prop-1-Enyl]-3-Ethylbenzoxazolium is a high-purity, functional cyanine dye derivative characterized by its sulfonated butyl side chain, which enhances its water solubility and stability. This compound is valued for its strong and tunable absorption in the visible to near-infrared spectrum, making it a critical component in advanced optical applications. It is primarily sought after by manufacturers and researchers in the photonics, analytical chemistry, and life sciences sectors for developing sensitive detection systems and functional materials.

Application

• Fluorescent Labeling and Staining: Used as a covalent or non-covalent label for biomolecules (proteins, nucleic acids) in fluorescence microscopy, flow cytometry, and immunoassays.
• Optical Sensor Development: A key chromophore in the fabrication of chemical sensors and biosensors for detecting pH, ions, or specific analytes due to its environment-sensitive fluorescence.
• Laser Dye and NIR Absorber: Employed in tunable dye lasers and as a near-infrared absorbing material in optical filters and data storage media.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer candidate for cancer treatment and antimicrobial applications.
• Nonlinear Optical Materials: Incorporated into polymers and crystals for research in nonlinear optics, including two-photon absorption and optical limiting.
• Inkjet and Digital Printing: Serves as a high-performance colorant for specialty inks requiring specific lightfastness and spectral properties.

Basic Information

Product Name	2-[3-[5,6-Dichloro-1-Ethyl-1,3-Dihydro-3-(3-Sulphonatobutyl)-2H-Benzimidazol-2-Ylidene]Prop-1-Enyl]-3-Ethylbenzoxazolium
CAS No.	40703-12-6
Molecular Formula	C27H30Cl2N3O4S
Molecular Weight	563.51 g/mol
Synonyms	3-Ethyl-2-[3-(1-ethyl-5,6-dichloro-3-(3-sulfonatobutyl)-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propen-1-yl]benzoxazolium; Cyanine dye, sulfo-butyl substituted; Benzoxazolium, 3-ethyl-2-[3-(1-ethyl-5,6-dichloro-3-(3-sulfonatobutyl)-1,3-dihydro-2H-benzimidazol-2-ylidene)-1-propenyl]-, inner salt; SULFO-CY5; SULFO-Cyanine5 analog; Near-infrared fluorescent dye; Water-soluble cyanine dye
EINECS	Contact for details

Quality Control

Every batch of our cyanine dye is produced under strict quality management and undergoes comprehensive analytical testing to ensure identity, purity, and performance consistency. We provide a detailed Certificate of Analysis (COA) with each shipment, which includes data from HPLC, NMR, and mass spectrometry. Our quality system is designed to meet the stringent requirements of research and diagnostic applications, ensuring reliable and reproducible results for our customers.

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 product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term storage, consider desiccant use.

Specification

Item	Specification
Appearance	Dark green to blue-green solid
Identification (IR)	Conforms to structure
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Absorption (λmax)	640 - 660 nm
Emission (λmax)	660 - 680 nm
Extinction Coefficient	≥ 180,000 cm⁻¹M⁻¹

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