Description

Sodium dihydrogen 4,5-dihydro-4-[[4-[[[2-methoxy-5-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]amino]carbonyl]phenyl]azo]-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate is a high-purity, water-soluble reactive dye intermediate of significant industrial importance. This compound is valued for its role in synthesizing brilliant and wash-fast dyes, particularly for textile applications. It is a critical raw material for manufacturers in the textile, specialty chemical, and ink industries who require consistent quality and reliable supply chains for advanced colorant production.

Application

• Primary Intermediate for Reactive Dyes: Key building block in the synthesis of high-performance reactive dyes for cotton, viscose, and other cellulosic fibers.
• Textile Coloration: Used to produce dyes known for excellent color yield, brightness, and superior wet-fastness properties.
• Specialty Ink Formulation: Serves as a precursor for pigments and dyes used in high-quality inkjet and other specialty printing inks.
• Research & Development: Employed in chemical R&D for developing novel chromophores and functional dyes with specific optical properties.
• Leather Dyeing: Potential application in the production of dyes for the leather industry, offering vibrant and durable colors.

Basic Information

Item	Detail
Product Name	Sodium dihydrogen 4,5-dihydro-4-[[4-[[[2-methoxy-5-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]amino]carbonyl]phenyl]azo]-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
CAS No.	21728-37-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	C.I. Reactive Red 198; Reactive Red 198; Sodium 4,5-dihydro-5-ox-1-(4-sulfophenyl)-4-[[4-[[[2-methoxy-5-[(2-sulfooxyethyl)sulfonyl]phenyl]amino]carbonyl]phenyl]azo]-1H-pyrazole-3-carboxylate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-[[4-[[[2-methoxy-5-[(2-sulfooxyethyl)sulfonyl]phenyl]amino]carbonyl]phenyl]azo]-5-oxo-1-(4-sulfophenyl)-, sodium salt; Reactive Red M-3BE; RR 198
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Quality is verified through advanced analytical techniques including HPLC and spectrophotometry. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture which can affect product quality and handling.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms
Purity (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Completely soluble
Heavy Metals	≤ 20 ppm

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