Description

4,4'-Bis[3-Carboxy-5-Oxo-1-(2,5-Disulfophenyl)-2-Pyrazolin-4-Yl]Trimethine Oxonole Tetrapotassium Salt is a high-purity, water-soluble functional dye belonging to the oxonole class, characterized by its anionic sulfonate and carboxylate groups. This compound is valued for its strong and tunable absorption in the visible spectrum, making it a critical component in advanced optical and analytical applications. It is primarily sought by manufacturers and R&D facilities in the photographic, optical filter, laser dye, and biological staining sectors for its precise light-modulating properties.

Application

• Photographic Sensitizers and Filter Dyes: Used in silver halide and color photographic materials to control spectral sensitivity and color balance.
• Laser Dyes: Serves as a gain medium in tunable dye lasers due to its efficient fluorescence and photostability.
• Biological Stains and Probes: Employed in histology and fluorescence microscopy as a non-toxic, water-compatible stain for cellular structures.
• Optical Filter Manufacturing: Incorporated into coatings and plastics to create precise optical filters for scientific instruments and display technologies.
• Non-linear Optical Materials: A candidate material for research in photonics and electro-optics due to its conjugated chromophore system.
• Analytical Chemistry Reagents: Used as a spectroscopic probe or indicator in various chemical assays and sensor applications.

Basic Information

Product Name	4,4'-Bis[3-Carboxy-5-Oxo-1-(2,5-Disulfophenyl)-2-Pyrazolin-4-Yl]Trimethine Oxonole Tetrapotassium Salt
CAS No.	101899-41-6
Molecular Formula	C34H16K4N4O20S4
Molecular Weight	1032.34 g/mol
Synonyms	Oxonole Tetrapotassium Salt; Bis-pyrazolone oxonole dye; NK 2012 (potential trade name); 4,4'-[1,3-Trimethylenebis[4-(2,5-disulfophenyl)-5-oxo-1H-pyrazole-3,4-diyl]]bis[4-oxo-2-butenoic acid] tetrapotassium salt; Anionic oxonole dye; Water-soluble pyrazolone dye; Photographic dye 101899-41-6.
EINECS	Contact for details

Quality Control

Every batch of our oxonole dye is produced under a strict quality management system to ensure consistency and performance. We employ advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis to verify chemical identity, purity, and the absence of critical impurities. A comprehensive Certificate of Analysis (COA) detailing assay, absorbance profile, and specific tests is provided with each shipment to support your quality assurance protocols.

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 should be kept in a desiccated environment to prevent moisture absorption, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to purple powder
Identification (IR)	Conforms to reference spectrum
Identification (UV-Vis)	λmax conforms
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Absorbance Profile	Within specified range
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution at 1% w/v

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