Description

Cy7.5 Diacid(Diso3) is a functionalized cyanine dye derivative featuring a diacid group and multiple sulfonate moieties, designed for enhanced water solubility and conjugation capabilities. This compound is a critical intermediate for synthesizing near-infrared (NIR) fluorescent probes and labels, offering superior photostability and high molar absorptivity. It is essential for researchers and manufacturers in the biotechnology, medical diagnostics, and pharmaceutical development sectors who require advanced labeling reagents for bioimaging, flow cytometry, and in vivo targeting applications.

Application

• Bioconjugation and Probe Synthesis: Primary building block for creating NIR fluorescent antibodies, peptides, and oligonucleotide conjugates.
• Bioimaging and Diagnostics: Used in the development of contrast agents for in vivo fluorescence imaging and histological staining.
• Flow Cytometry Reagents: Key component in manufacturing fluorescent dyes for cell sorting and analysis.
• Pharmaceutical Research: Employed in drug discovery for labeling and tracking drug candidates and biomolecules.
• Material Science: Functional dye for creating light-harvesting arrays or sensors due to its NIR absorption/emission profile.

Basic Information

Product Name	Cy7.5 Diacid(Diso3)
CAS No.	752189-27-8
Molecular Formula	C53H61N2O13S33- • 3Na+ (or similar salt form)
Molecular Weight	~1100 g/mol (Contact for exact salt form weight)
Synonyms	Cy7.5 dicarboxylic acid, trisulfonated; Sulfo-Cyanine7.5 diacid; 2-[7-[1,3-Dihydro-1,1-dimethyl-3-(4-sulfobutyl)-2H-benz[e]indol-2-ylidene]-1,3,5-heptatrienyl]-1,1-dimethyl-3-(4-sulfobutyl)-1H-benz[e]indolium-5-carboxylic acid, inner salt, sodium salt; NIR dye diacid; Heptamethine cyanine diacid derivative; Water-soluble Cy7.5 NHS ester precursor; Fluorescent labeling agent CAS 752189-27-8
EINECS	Contact for details

Quality Control

Our Cy7.5 Diacid(Diso3) is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, NMR spectroscopy, and mass spectrometry, to ensure it meets the high standards required for sensitive research and diagnostic applications. Certificates of Analysis (COA) with detailed chromatographic data are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below under desiccant for long-term stability. For short-term use, store at 2-8°C. The product is light-sensitive (store away from light) and hygroscopic. Allow the vial to equilibrate to room temperature before opening to minimize moisture uptake.

Specification

Item	Specification
Appearance	Dark green to blue-green solid
Identification (HPLC)	Conforms to reference standard
Identification (UV-Vis)	λmax ~788 nm ± 5 nm
Purity (HPLC, Area%)	≥ 95%
Water Content (KF)	≤ 5.0%
Solubility	Freely soluble in water, DMSO

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