Description

Squarain-Carboxylate* CAS NO 154161-79-2 is a functionalized squaraine dye derivative featuring a carboxylate group, which enhances its solubility and provides a versatile site for bioconjugation. This compound is valued for its strong near-infrared (NIR) absorption and fluorescence, making it an essential component for advanced optical applications. It is primarily needed by researchers and manufacturers in the fields of bioimaging, photodynamic therapy, and the development of organic photovoltaics and sensors.

Application

• Bioimaging Probes: Used as a fluorescent label for in vitro and in vivo imaging due to its NIR emission, which offers deeper tissue penetration and reduced background autofluorescence.
• Photodynamic Therapy (PDT): Acts as a photosensitizer for targeted cancer cell destruction upon light activation.
• Organic Photovoltaic (OPV) Cells: Serves as an electron acceptor or active layer component in the development of efficient solar energy conversion devices.
• Chemical Sensors: Employed in the fabrication of optochemical sensors for detecting ions, gases, or biomolecules based on fluorescence quenching or enhancement.
• Non-linear Optics (NLO): Utilized in research for its potential in optical limiting and frequency conversion applications.
• Bioconjugation & Drug Delivery: The carboxylate group enables covalent attachment to antibodies, peptides, or nanoparticles for targeted diagnostic and therapeutic platforms.

Basic Information

Product Name	Squarain-Carboxylate*
CAS No.	154161-79-2
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Squaraine-carboxylic acid; Carboxy-functionalized squaraine; Squaraine dye carboxylate; 1,3-Bis[(3-carboxypropyl)-2,3,3-trimethyl-3H-indolium]squaraine; NIR squaraine carboxylate; Squaraine acid dye; Oxocyclobutenolate derivative; Squaraine-based bioconjugation reagent
EINECS	Contact for details

Quality Control

Our Squarain-Carboxylate* is produced under stringent quality management protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity verification and spectroscopic methods for structural confirmation, to ensure consistency and compliance with research-grade standards. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store the product in a freezer at -20°C or below under an inert atmosphere (e.g., argon or nitrogen) to minimize oxidation and ensure long-term stability. Allow the container to reach room temperature in a desiccator before opening to prevent moisture condensation.

Specification

Item	Specification
Appearance	Dark green to blue-black solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95%
λmax (Absorption)	Contact for details
λmax (Emission)	Contact for details
Moisture Content	≤ 2.0%
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.