Description

Cyanine 3 Monofunctional Mtsea Dye, Potassium Salt is a high-purity, reactive fluorescent labeling agent designed for the covalent conjugation of biomolecules. This compound is a critical tool for researchers and developers requiring stable, bright, and specific labeling in complex biological systems. It is primarily utilized in the life sciences, diagnostics, and pharmaceutical development sectors for applications such as fluorescence microscopy, flow cytometry, and in vivo imaging.

Application

• Bioconjugation and Biomolecule Labeling: Covalent attachment to proteins, antibodies, peptides, and oligonucleotides for creating fluorescent probes.
• Fluorescence Microscopy & Imaging: Used as a bright, photostable fluorophore for cellular and tissue imaging, including super-resolution techniques.
• Flow Cytometry (FACS): Enables the detection and sorting of specific cell populations based on fluorescent signal.
• In Vivo Imaging: Suitable for labeling agents in preclinical animal studies due to its favorable excitation/emission profiles.
• Diagnostic Assay Development: Integral component in the development of fluorescent immunoassays (FLISA) and other diagnostic kits.
• Nucleic Acid Detection: Labeling of probes for fluorescence in situ hybridization (FISH) and real-time PCR applications.
• Drug Discovery & High-Throughput Screening (HTS): Used in assays to monitor protein-protein interactions, enzyme activity, and cellular uptake.

Basic Information

Product Name	Cyanine 3 Monofunctional Mtsea Dye, Potassium Salt
CAS No.	1381807-52-8
Molecular Formula	C37H45KN4O6S2
Molecular Weight	745.01 g/mol
Synonyms	Cy3-MTSEA, Potassium Salt; Cyanine3 maleimide; Sulfo-Cy3 maleimide derivative; 1-(3-((E)-2-((E)-2-(1-(2-(2,5-Dioxo-2,5-dihydro-1H-pyrrol-1-yl)ethyl)-3,3-dimethyl-5-sulfoindolin-2-ylidene)ethylidene)-3,3-dimethylindolin-1-yl)propane-1-sulfonate, Potassium Salt; Cy3® maleimide; Reactive Cy3 dye; MTSEA-Cy3
EINECS	Contact for details

Quality Control

Every batch of Cyanine 3 Monofunctional Mtsea Dye, Potassium Salt is manufactured under strict quality management systems and undergoes comprehensive analytical testing. We ensure compliance with high-purity standards suitable for life science research and in vitro diagnostic use. A detailed Certificate of Analysis (COA) providing purity, identity, and performance data is supplied with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below under desiccant. This product is hygroscopic (moisture-sensitive) and light-sensitive. Allow the vial to equilibrate to room temperature in a dry environment before opening to prevent condensation and moisture uptake.

Specification

Item	Specification
Appearance	Dark green to purple solid
Identification (HPLC & MS)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Extinction Coefficient (ε)	~150,000 cm⁻¹M⁻¹ at λmax
λmax (Absorption)	548 - 552 nm
λmax (Emission)	562 - 568 nm
Water Content (KF)	≤ 5.0 %
Functional Activity	Conforms (by labeling test)

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