Description

Dipotassium p-[4,5-Dihydro-4-[3-[5-Hydroxy-3-Methyl-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Allylidene]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is a high-purity, water-soluble pyrazolone derivative primarily used as a key intermediate in the synthesis of advanced colorants and functional dyes. This compound matters for its role in producing vivid and stable hues, particularly in applications requiring high lightfastness and chemical resistance. It is essential for manufacturers in the textile, ink, and specialty polymer industries seeking to develop high-performance colorants.

Application

• Textile Dye Intermediate: A critical precursor for synthesizing reactive and acid dyes for nylon, wool, and silk, offering excellent wash and light fastness.
• Inkjet Ink Formulation: Used in the production of high-quality colorants for industrial and photographic inkjet inks, ensuring color vibrancy and stability.
• Functional Polymer Additive: Imparts specific optical or UV-absorbing properties when incorporated into specialty polymers and coatings.
• Liquid Crystal Display (LCD) Color Filters: Serves as a key chemical in manufacturing color filters for displays, requiring precise color purity and thermal stability.
• Analytical Reagent & Staining Agent: Employed in laboratory settings as a staining agent in histology or as a chromogenic component in diagnostic kits.
• Research & Development: Used in academic and industrial R&D for exploring new photonic materials, organic semiconductors, and sensor technologies.

Basic Information

Product Name	Dipotassium p-[4,5-Dihydro-4-[3-[5-Hydroxy-3-Methyl-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Allylidene]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate
CAS No.	65132-20-9
Molecular Formula	C23H18K2N4O8S2
Molecular Weight	620.84 g/mol
Synonyms	Dipotassium 5-hydroxy-3-methyl-1-(4-sulfonatophenyl)-4-[(E)-3-[5-hydroxy-3-methyl-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl]prop-2-en-1-ylidene]-1H-pyrazole-4-carboxylate; C.I. Reactive Yellow 2 (related class); Pyrazolone Yellow Intermediate; 1H-Pyrazole-4-carboxylic acid, 4,5-dihydro-5-oxo-4-[(E)-3-[5-hydroxy-3-methyl-1-(4-sulfophenyl)-1H-pyrazol-4-yl]-1-oxo-2-propen-1-yl]-3-methyl-1-(4-sulfophenyl)-, dipotassium salt; Dipotassium 4,5-dihydro-4-[(E)-3-(5-hydroxy-3-methyl-1-(4-sulfonatophenyl)-1H-pyrazol-4-yl)prop-2-en-1-ylidene]-3-methyl-5-oxo-1-(4-sulfonatophenyl)-1H-pyrazole-4-carboxylate
EINECS	Contact for details

Quality Control

Our Dipotassium p-[4,5-Dihydro-4-[3-[5-Hydroxy-3-Methyl-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Allylidene]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical 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 a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after each use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble
pH (1% Solution)	6.0 - 8.0

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