Description

Cy3 Acid(Mono So3) CAS NO 644979-14-6 is a key sulfonated cyanine dye derivative, widely recognized for its excellent water solubility and fluorescence properties. This compound is essential for creating stable, bright fluorescent conjugates for advanced detection and imaging applications. It is primarily utilized by researchers and manufacturers in the biotechnology, diagnostics, and pharmaceutical development sectors who require high-performance labeling reagents.

Application

• Biomolecule Labeling: Covalent conjugation to proteins, antibodies, peptides, and nucleic acids (DNA/RNA) for fluorescence-based assays.
• Bioimaging & Microscopy: Used as a fluorescent probe in cell imaging, tissue staining, and live-cell tracking applications.
• Diagnostic Assays: Critical component in the development of ELISA, flow cytometry, and lateral flow immunoassays.
• Drug Discovery & Screening: Employed in high-throughput screening (HTS) and fluorescence resonance energy transfer (FRET) studies.
• Material Science: Functionalization of nanoparticles and polymers to create fluorescent materials for sensing and tracking.

Basic Information

Product Name	Cy3 Acid(Mono So3)
CAS No.	644979-14-6
Molecular Formula	C31H33KN2O7S2 (Potassium salt form common)
Molecular Weight	Contact for details
Synonyms	Sulfo-Cyanine3 acid; Cyanine3 sulfonic acid; Cy3 Mono Sulfonate; 1-(5-Carboxypentyl)-3,3-dimethyl-2-((E)-3-((E)-1,3,3-trimethylindolin-2-ylidene)prop-1-en-1-yl)-3H-indol-1-ium-5-sulfonate; Sulfo-Cy3 carboxylic acid; Cy3™ sulfonate NHS ester precursor; Cy3 fluorescent dye acid form; 644979-14-6
EINECS	Contact for details

Quality Control

Our Cy3 Acid(Mono So3) is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity for sensitive applications. Each lot is characterized by advanced analytical techniques including HPLC, NMR, and mass spectrometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and performance metrics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 15-25°C. This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. For long-term stability, consider storage under inert atmosphere or desiccant.

Specification

Item	Specification
Appearance	Dark red to purple solid
Identification (HPLC)	Conforms to reference standard
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Extinction Coefficient	Contact for details
Fluorescence Properties	Contact for details

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