Description

Cy3.5 Diacid CAS NO 1350556-83-0 is a high-purity, functionalized cyanine dye derivative featuring two carboxylic acid groups, making it a versatile intermediate for bioconjugation. This compound is essential for creating stable, fluorescent probes with enhanced water solubility and site-specific labeling capabilities. It is primarily needed by researchers and manufacturers in the fields of biomedical diagnostics, flow cytometry, and in vivo imaging who require reliable and consistent fluorescent labeling reagents.

Application

• Bioconjugation Reagent: Used for covalent labeling of proteins, antibodies, peptides, and oligonucleotides via its carboxylic acid groups.
• Fluorescent Probe Synthesis: Serves as a key intermediate in the synthesis of near-infrared (NIR) fluorescent dyes and sensors.
• Diagnostic Assay Development: Employed in the manufacturing of reagents for ELISA, lateral flow assays, and other immunoassay platforms.
• Cell Imaging and Tracking: Facilitates the creation of probes for fluorescence microscopy, flow cytometry, and cell lineage tracing.
• Pharmaceutical Research: Used in drug discovery for target identification, biomarker detection, and pharmacokinetic studies.
• Material Science: Applied in the development of functionalized nanoparticles and polymeric materials with fluorescent properties.

Basic Information

Product Name	Cy3.5 Diacid
CAS No.	1350556-83-0
Molecular Formula	C37H41N2O6S2+ • 2X- (X = counterion)
Molecular Weight	Contact for details
Synonyms	Cy3.5 bis(carboxylic acid); Sulfo-Cyanine3.5 diacid; 1,1'-(4,4,7,7-Tetramethyl-4,7-dihydro-5H-4,7-methano-2H-benzimidazole)-bis(butane-1-sulfonic acid) derivative; Cyanine3.5 diacid; Cy3.5 NHS ester precursor; NIR dye diacid intermediate; Carboxy-functionalized Cy3.5
EINECS	Contact for details

Quality Control

Our Cy3.5 Diacid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance for sensitive bioconjugation applications. Certificates of Analysis (COA) with detailed specifications from HPLC, NMR, and mass spectrometry are provided to guarantee 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 or as indicated on the label. This material is hygroscopic (moisture-sensitive). Allow the sealed vial to equilibrate to room temperature before opening to minimize moisture absorption.

Specification

Item	Specification
Appearance	Dark green to purple solid
Identification (HPLC)	Conforms to reference standard
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Solubility	Soluble in DMSO, DMF; sparingly soluble in water

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