Description

4-[[5-[[4-Chloro-6-[(3-Sulphophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]-2-Sulphophenyl]Azo]-4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid is a high-purity, water-soluble anionic dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple sulphonate groups and a reactive triazine ring, makes it a key precursor for synthesizing high-performance reactive and direct dyes. This compound is primarily sought by manufacturers in the textile and specialty chemical industries who require consistent quality and reliable supply for their production processes.

Application

• Primary Intermediate for Reactive Dyes: Synthesis of high-washfastness reactive dyes for cotton, viscose, and other cellulosic fibers.
• Precursor for Direct Dyes: Manufacturing of direct dyes with excellent substantivity for paper and textile applications.
• Specialty Dye Production: Used in the creation of complex, polyfunctional dyes for niche applications requiring specific color properties.
• Research & Development: Serves as a building block in R&D for novel chromophores and functional dyes.
• Colorant for Industrial Applications: Potential use in the formulation of colorants for inks, coatings, and other industrial products where anionic character is beneficial.

Basic Information

Item	Details
Product Name	4-[[5-[[4-Chloro-6-[(3-Sulphophenyl)Amino]-1,3,5-Triazin-2-Yl]Amino]-2-Sulphophenyl]Azo]-4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid
CAS No.	93858-25-4
Molecular Formula	C26H16ClN9O11S3
Molecular Weight	786.10 g/mol
Synonyms	Acid Red 337; C.I. 17200; Reactive Red Dye Intermediate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-4-[[5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-1-(4-sulfophenyl)-; Trisulfonated Azo Pyrazole Dye Intermediate; 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[[5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-1H-pyrazole-3-carboxylic acid
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance protocols.

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 opening to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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