Description

4-[[2,5-Dimethoxy-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. This compound is valued for its ability to impart bright, stable colors and its reactivity as a key building block in synthetic chemistry. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing advanced dyes and pigments.

Application

This specialized azo intermediate serves as a critical precursor in various colorant manufacturing processes. Its primary and related applications include:

• Reactive Dye Synthesis: A key intermediate for manufacturing high-quality reactive dyes used in textile dyeing and printing.
• Acid Dye Production: Used in the formulation of acid dyes for coloring nylon, silk, wool, and leather.
• Inkjet Ink Formulations: Employed in the production of colorants for high-performance digital and industrial inkjet inks.
• Functional Dye Manufacturing: Serves as a building block for dyes used in optical data storage, LCD color filters, and other electronic applications.
• Laboratory & Research: Used as a standard or reagent in chemical research and analytical method development for dye chemistry.
• Specialty Pigments: A precursor in the synthesis of complex organic pigments with enhanced properties.

Basic Information

Item	Details
Product Name	4-[[2,5-Dimethoxy-4-[[2-(Sulphooxy)Ethyl]Sulphonyl]Phenyl]Azo]-4,5-Dihydro-5-Oxo-1-(4-Sulphophenyl)-1H-Pyrazole-3-Carboxylic Acid, Sodium Salt
CAS No.	85536-88-5
Molecular Formula	C20H17N4Na3O15S3
Molecular Weight	742.50 g/mol
Synonyms	Reactive Red 198 (Parent Dye Acid); Sodium 4-[(2,5-dimethoxy-4-{[2-(sulfonatooxy)ethyl]sulfonyl}phenyl)azo]-4,5-dihydro-5-oxo-1-(4-sulfonatophenyl)-1H-pyrazole-3-carboxylate; C.I. Reactive Red 198 intermediate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-((2,5-dimethoxy-4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)-5-oxo-1-(4-sulfophenyl)-, sodium salt; Azo dye intermediate 85536-88-5; RR 198 intermediate; Sulfonated azo pyrazole carboxylic acid sodium salt
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to stringent quality management systems to ensure batch-to-batch consistency and reliability. Every lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing all critical specifications are provided and available upon request 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Solubility in Water	Freely soluble

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