Description

5-Methoxy-3-Methyl-2-[2-[[3-(3-Sulphonatopropyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]Benzoxazolium is a high-purity, water-soluble cyanine dye derivative, valued for its strong near-infrared (NIR) absorption and fluorescence properties. This compound is engineered to provide exceptional photostability and high molar extinction coefficients, making it a critical component in advanced optical applications. It is primarily utilized by manufacturers and researchers in the biotechnology, medical diagnostics, and materials science sectors for labeling, sensing, and imaging.

Application

• Fluorescent Labeling Agent: Used as a covalent tag for biomolecules (proteins, nucleic acids) in fluorescence microscopy and flow cytometry.
• Optical Imaging Probes: A key component in the formulation of contrast agents for in vivo and in vitro NIR fluorescence imaging in preclinical research.
• Sensor Development: Acts as a signaling moiety in the construction of chemical and biological sensors for ion detection and enzymatic activity assays.
• Photodynamic Therapy (PDT) Research: Investigated as a potential photosensitizer due to its light-absorbing characteristics in therapeutic applications.
• Laser Dye & Optical Materials: Employed in the development of tunable dye lasers and as a dopant in advanced polymeric materials for photonic devices.
• Industrial Colorants: Suitable for specialized applications requiring NIR-absorbing dyes in security inks or functional coatings.

Basic Information

Product Name	5-Methoxy-3-Methyl-2-[2-[[3-(3-Sulphonatopropyl)-3H-Benzothiazol-2-Ylidene]Methyl]But-1-Enyl]Benzoxazolium
CAS No.	55811-26-2
Molecular Formula	C26H29N2O5S2+ • X-
Molecular Weight	Approx. 513.65 g/mol (cation)
Synonyms	Cyanine Dye 55811-26-2; Benzothiazolium, 2-[2-[(3-(3-sulfopropyl)-2(3H)-benzothiazolylidene)methyl]-1-butenyl]-5-methoxy-3-methyl-, inner salt; NIR Cyanine Dye; Sulfo-Cyanine Dye; Water-soluble Benzothiazole Cyanine; IR-780 derivative; 3H-Benzothiazolium, 2-[2-[[3-(3-sulfopropyl)-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-5-methoxy-3-methyl-, hydroxide, inner salt
EINECS	Contact for details

Quality Control

Every batch of this cyanine dye is produced under strict quality management and undergoes comprehensive analytical testing to ensure identity, purity, and performance consistency. Our rigorous quality testing includes HPLC for purity assessment, NMR and MS for structural confirmation, and spectrophotometry to verify optical properties. A Certificate of Analysis (COA) detailing all test results is provided with each shipment and is available upon request.

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. For long-term storage, consider desiccation.

Specification

Item	Specification
Appearance	Dark green to blue-black powder
Identification (IR)	Conforms to structure
Identification (UV-Vis)	Conforms (λmax in specified range)
Purity (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Residue on Ignition	≤ 1.0%
Absorption Maxima	Contact for details
Extinction Coefficient	Contact for details

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