Description

4-Chloro-3-[4-[(2,5-Dichlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is a high-purity, specialized azo dye intermediate essential for producing vivid and stable colorants. Its complex molecular structure provides excellent chromophoric properties, making it a critical component for manufacturers requiring precise color performance and batch-to-batch consistency. This compound is primarily utilized by the dye and pigment industries, as well as in advanced material science research.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of high-performance yellow to orange azo dyes and organic pigments.
• Textile Dyeing: Used in the manufacturing of dyes for coloring natural and synthetic fibers, offering good light and wash fastness.
• Ink Formulations: Incorporated into industrial and specialty printing inks to achieve specific color shades and stability.
• Plastic and Polymer Coloring: Acts as a colorant intermediate for masterbatches used in plastics, resins, and synthetic materials.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying structure-property relationships in dye chemistry.
• Specialty Coatings: Used in the production of pigments for paints, lacquers, and other surface coatings requiring durable color.

Basic Information

Item	Details
Product Name	4-Chloro-3-[4-[(2,5-Dichlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	94158-03-9
Molecular Formula	C16H11Cl3N4O4S
Molecular Weight	461.70 g/mol
Synonyms	4-Chloro-3-[4-[(2,5-dichlorophenyl)azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid; Benzenesulfonic acid, 4-chloro-3-[4-[(2,5-dichlorophenyl)azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-; Azo dye intermediate 94158-03-9; 1-(4-Chloro-3-sulfophenyl)-3-methyl-4-[(2,5-dichlorophenyl)azo]-5-pyrazolone; C.I. Azoic Coupling Component (variant); Pyrazolone-based sulfonic acid azo compound
EINECS	Contact for details

Quality Control

Our production of 4-Chloro-3-[4-[(2,5-Dichlorophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chemical structure, and optimal performance as a dye intermediate. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided to guarantee supply reliability and technical compliance for your manufacturing processes.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility (Test)	Soluble in alkaline aqueous solutions

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