Description

4-[4-[(2-Chlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is a specialized azo dye intermediate characterized by its distinct pyrazolone and benzenesulfonic acid structure. This compound is valued for its role as a key precursor in the synthesis of high-performance pigments and dyes, offering excellent color properties and stability. It is primarily required by manufacturers in the colorant industry, particularly for producing pigments used in inks, plastics, and coatings where lightfastness and chemical resistance are critical.

Application

• Primary intermediate for the synthesis of high-performance azo pigments and dyes.
• Key component in manufacturing colorants for industrial inks, including printing and packaging inks.
• Used in the production of pigments for coloring plastics and synthetic polymers.
• Essential raw material for dyes applied in coatings and paints.
• Potential use in the research and development of specialty colorants for niche applications.
• May serve as a chemical building block in organic synthesis for related heterocyclic compounds.

Basic Information

Product Name	4-[4-[(2-Chlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	16568-46-0
Molecular Formula	C16H13ClN4O4S
Molecular Weight	392.82 g/mol
Synonyms	Benzenesulfonic acid, 4-[4-[(2-chlorophenyl)azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-; 1-(4-Sulfophenyl)-3-methyl-4-(2-chlorophenylazo)-5-pyrazolone; C.I. Pigment Yellow 1 Intermediate; 2-Chloro-4'-[(3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-yl)diazenyl][1,1'-biphenyl]-4-sulfonic acid; Azo pyrazolone intermediate; Light-sensitive (store away from light)
EINECS	Contact for details

Quality Control

Our production of 4-[4-[(2-Chlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The material undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to meet the exacting standards of the colorant industry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and specific parameters is provided with each shipment to support your quality assurance processes.

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). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, containers should be opaque or stored in darkness to prevent degradation.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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