Description

1,1'-Bis(4-Sulfophenyl)-3,3'-Dicarboxy-5,5'-Dihydroxypyrazolo-4,4'-Trimethine Oxonole Tetrasodium Salt is a high-purity, water-soluble organic dye belonging to the polymethine oxonole class. This compound matters for its exceptional performance as a fluorescent probe and biological stain, offering high quantum yield and photostability. It is primarily needed by manufacturers and research institutions in the biotechnology, diagnostics, and analytical chemistry sectors for sensitive detection applications.

Application

• Fluorescent Labeling Agent: For covalent conjugation to proteins, antibodies, and nucleic acids in assay development.
• Biological Staining: Used in fluorescence microscopy and flow cytometry for cellular and subcellular imaging.
• Diagnostic Reagents: A key component in the formulation of lateral flow assays (LFAs) and ELISA kits.
• Sensor Technology: Employed in the development of chemical sensors and biosensors for ion or molecule detection.
• Laser Dyes: Potential use in tunable dye lasers due to its polymethine structure.
• Photodynamic Therapy (PDT) Research: Investigated as a photosensitizer in preclinical studies.
• Inkjet Printing: For specialty inks requiring specific fluorescent properties.
• Material Science: Incorporation into polymers or nanoparticles for advanced functional materials.

Basic Information

Item	Details
Product Name	1,1'-Bis(4-Sulfophenyl)-3,3'-Dicarboxy-5,5'-Dihydroxypyrazolo-4,4'-Trimethine Oxonole Tetrasodium Salt
CAS No.	70024-44-1
Molecular Formula	C31H18N4Na4O16S2
Molecular Weight	864.57 g/mol (approx.)
Synonyms	SPQ (Sulfophenylquinoline) derivative; Bis-SPQ dye; Oxonole Violet; Tetrasodium 1,1'-[3,3'-dicarboxy-5,5'-dihydroxy-1H,1'H-[4,4'-bipyrazole]-1,1'-diyl]bis(4-sulfobenzene); Fluorescent oxonole dye; Sulfonated pyrazolo-oxonole dye; 70024-44-1; Light-sensitive fluorescent probe
EINECS	Contact for details

Quality Control

Every batch of our 1,1'-Bis(4-Sulfophenyl)-3,3'-Dicarboxy-5,5'-Dihydroxypyrazolo-4,4'-Trimethine Oxonole Tetrasodium Salt is manufactured under a strict quality management system. We perform rigorous in-process and final testing to ensure consistent purity, fluorescence performance, and batch-to-batch reproducibility. Certificates of Analysis (COA) detailing HPLC purity, absorbance/emission profiles, and functional performance are provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed in a dry environment to prevent moisture absorption. For long-term storage, consider desiccants or inert atmosphere.

Specification

Item	Specification
Appearance	Dark purple to black powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Absorption Max (λmax)	Contact for details
Emission Max (λem)	Contact for details
Extinction Coefficient	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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