Description

n-(m-Peg9)-N'-(Peg5-Acid)-Cy5 is a heterobifunctional polyethylene glycol (PEG) linker conjugated to the cyanine dye Cy5, designed for advanced bioconjugation and labeling applications. This compound is engineered to provide a hydrophilic spacer arm and a reactive acid group, facilitating the stable attachment of biomolecules for imaging and diagnostic purposes. It is a critical reagent for researchers and manufacturers in the fields of biopharmaceuticals, in vitro diagnostics (IVD), and life science research who require high-performance fluorescent probes.

Application

• Bioconjugation Reagent: For site-specific labeling of proteins, antibodies, peptides, and oligonucleotides with the Cy5 fluorophore.
• Diagnostic Assay Development: Used in the synthesis of fluorescent probes for lateral flow assays, ELISA, and other immunoassay platforms.
• In Vivo/In Vitro Imaging: Creation of targeted imaging agents for fluorescence microscopy, flow cytometry, and small animal imaging studies.
• Drug Delivery & Therapeutics: As a component in the design of PEGylated therapeutic conjugates, enabling tracking and biodistribution studies.
• Biomaterial Functionalization: Surface modification of nanoparticles, hydrogels, and other materials to introduce fluorescence and specific binding sites.

Basic Information

Product Name	n-(m-Peg9)-N'-(Peg5-Acid)-Cy5
CAS No.	2107273-26-5
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Cy5-PEG9-PEG5-acid; Maleimide-PEG9-PEG5-Cy5 Acid; Cyanine5-PEG(9)-PEG(5)-COOH; Cy5-PEG(9)-PEG(5)-Acid; mPEG9-PEG5-Cy5 Acid; Heterobifunctional Cy5-PEG Linker; N-(Maleimide-PEG9)-N'-(PEG5-Acid)-Cy5; Cy5-PEG-biotin linker analog
EINECS	Contact for details

Quality Control

Our n-(m-Peg9)-N'-(Peg5-Acid)-Cy5 is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for sensitive research and diagnostic applications. A comprehensive Certificate of Analysis (COA) detailing purity, absorbance, and functional group integrity is provided with every shipment.

Storage

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

Specification

Item	Specification
Appearance	Dark blue to purple solid or film
Identification (HPLC/UV-Vis)	Conforms
Purity (HPLC)	≥ 95%
Absorbance (λmax)	~649 nm
Emission (λmax)	~670 nm
Extinction Coefficient (ε)	Contact for details
Functional Group Integrity	Conforms (by NMR or assay)
Moisture Content (KF)	≤ 1.0%

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