Description

Benzensulfonic acid,4-[4,5-dihydro-4-[5-[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]-2,4-pentadienylidene]-3-methyl-5-oxo-1H-pyrazol-1-yl]-,dipotassium salt is a high-purity, water-soluble organic salt belonging to the pyrazolone-based dye intermediate class. This compound is valued for its role as a key chromophore and functional intermediate in the synthesis of specialized colorants. It is primarily sought by manufacturers in the dyes and pigments, specialty chemicals, and advanced materials sectors for developing products with specific optical and chemical properties.

Application

• Dye and Pigment Intermediate: A critical precursor for synthesizing high-performance azo and pyrazolone dyes, particularly for textiles, inks, and coatings.
• Specialty Colorant Production: Used in the manufacture of colorants requiring specific solubility, lightfastness, and hue characteristics for niche applications.
• Functional Material Synthesis: Serves as a building block in creating advanced materials where its conjugated structure contributes to optical or electronic properties.
• Research & Development: Employed in chemical R&D for exploring new chromophores, sensor materials, or photoactive compounds.
• Analytical Reagent: Potential use as a standard or reagent in analytical chemistry for method development and calibration.

Basic Information

Product Name	Benzensulfonic acid,4-[4,5-dihydro-4-[5-[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]-2,4-pentadienylidene]-3-methyl-5-oxo-1H-pyrazol-1-yl]-,dipotassium salt
CAS No.	72796-93-1
Molecular Formula	C26H20K2N4O9S2
Molecular Weight	666.78 g/mol
Synonyms	Acid Yellow 220 (Dipotassium Salt); C.I. 27790; Dipotassium 4-[4,5-dihydro-4-[(E)-5-[5-hydroxy-3-methyl-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl]penta-2,4-dien-2-ylidene]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonate; 4-[4,5-Dihydro-4-[(E)-5-[5-hydroxy-3-methyl-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl]penta-2,4-dien-2-ylidene]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid dipotassium salt; Pyrazolone Yellow; Food Yellow 4 (related lake/complex); Acid Yellow 220K; Dipotassium 1-(4-sulfophenyl)-4-[4,5-dihydro-4-[(E)-5-[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]-2,4-pentadienylidene]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonate
EINECS	Contact for details

Quality Control

Our production of Benzensulfonic acid,4-[4,5-dihydro-4-[5-[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]-2,4-pentadienylidene]-3-methyl-5-oxo-1H-pyrazol-1-yl]-,dipotassium salt adheres to stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and consistent performance. Certificates of Analysis (COA) detailing all relevant parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are sealed immediately after use to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (Water)	Freely soluble

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