Description

Cyanine Dye 2 CAS NO 57282-57-2 is a near-infrared (NIR) fluorescent dye belonging to the cyanine family, characterized by its high molar absorptivity and fluorescence quantum yield. This compound is essential for advanced bioimaging and diagnostic applications due to its excellent photostability and deep tissue penetration capabilities. It is primarily needed by researchers and manufacturers in the biotechnology, pharmaceutical, and medical diagnostics sectors for applications such as fluorescence microscopy, in vivo imaging, and biosensor development.

Application

• Fluorescence Microscopy & Bioimaging: Used as a contrast agent for labeling cellular structures, proteins, and nucleic acids in live-cell and fixed-cell imaging.
• In Vivo Imaging: Employed in preclinical research for non-invasive deep-tissue imaging in small animal models due to its NIR emission.
• Biosensor Development: Serves as a key fluorescent reporter in the design of diagnostic assays and detection kits for various analytes.
• Flow Cytometry: Utilized for cell sorting and analysis by conjugating to antibodies or other targeting ligands.
• Optical Data Storage & Photonics: Applied in research for developing novel materials for optical switches and data recording media.
• Polymer & Material Science: Incorporated into polymers and nanoparticles to create functional, fluorescent materials for tracking and sensing.

Basic Information

Product Name	Cyanine Dye 2
CAS No.	57282-57-2
Molecular Formula	C29H31IN2O3S2
Molecular Weight	670.60 g/mol
Synonyms	Cy2; Cyanine 2; Sulfo-Cyanine2; 2-((1E,3E)-5-((E)-2-((1E,3E)-3-(3-(2,5-Dioxopyrrolidin-1-yl)oxy)-3-oxopropyl)-5-sulfo-1,3-dihydro-2H-indol-2-ylidene)prop-1-en-1-yl)-1-(5-carboxypentyl)-3,3-dimethyl-3H-indol-1-ium-5-yl)vinyl)-1-ethyl-3,3-dimethyl-3H-indol-1-ium; 1,1'-(4,7,10-Trioxa-1,13-tridecanediyl)bis[4-[3-(3-methyl-2(3H)-benzothiazolylidene)-1-propenyl]quinolinium] diiodide (related structure); NIR Dye; Heptamethine cyanine dye derivative.
EINECS	Contact for details

Quality Control

Our Cyanine Dye 2 is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, NMR and MS for structural confirmation, and spectrophotometry for optical property verification. A Certificate of Analysis (COA) detailing batch-specific results is provided to ensure traceability and compliance with your research or production standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C (refrigerated) or as specified on the label or COA. This product is hygroscopic (moisture-sensitive); ensure the container is sealed tightly after each use to minimize exposure to atmospheric moisture. For long-term storage, consider desiccant or under an inert atmosphere.

Specification

Item	Specification
Appearance	Dark green to blue-green solid
Identification (HPLC)	Conforms to reference standard
Identification (MS)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 3.0%
Absorption Max (λmax)	750 - 770 nm
Emission Max (λem)	770 - 790 nm
Extinction Coefficient (ε)	≥ 200,000 M-1cm-1

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