Description

Disodium Hydrogen 4,5-Dihydro-5-Oxo-4-[[4-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]-1-(3-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate is a high-purity, water-soluble anionic dye intermediate, specifically a reactive dye precursor. This compound is valued for its ability to form strong covalent bonds with textile fibers, resulting in excellent wash and light fastness properties. It is primarily required by manufacturers in the textile, specialty ink, and advanced materials sectors for producing vibrant and durable colorants.

Application

• Reactive Dye Synthesis: A key intermediate for manufacturing high-performance reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Textile Coloration: Imparts bright, wash-fast colors with excellent stability in textile finishing processes.
• Inkjet Inks: Used in the formulation of specialty inks for digital textile printing, offering superior color gamut and durability.
• Leather Dyeing: Employed in the production of dyes for leather goods, providing deep, uniform coloration.
• Paper Coloring: Suitable for high-grade paper and specialty paper products requiring color fastness.
• Biomolecule Staining: Potential use in research and diagnostic applications for staining specific biological structures.

Basic Information

Product Name	Disodium Hydrogen 4,5-Dihydro-5-Oxo-4-[[4-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]-1-(3-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate
CAS No.	84030-06-8
Molecular Formula	C20H14N4Na2O13S3
Molecular Weight	684.51 g/mol
Synonyms	Reactive Red 198 (Dye precursor); 4,5-Dihydro-5-oxo-4-[[4-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]azo]-1-(3-sulphophenyl)-1H-pyrazole-3-carboxylic acid, disodium salt; C.I. Reactive Red 198 intermediate; Disodium 5-oxo-4-[(4-{2-[(sulfonatooxy)ethyl]sulfonyl}phenyl)hydrazinylidene]-1-(3-sulfonatophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate; Azo pyrazole dye intermediate; Sulfonated azo pyrazole compound
EINECS	Contact for details

Quality Control

Our production of this dye intermediate adheres to strict quality management systems, ensuring batch-to-batch consistency for critical applications. Quality is verified through comprehensive analytical methods including HPLC, UV-Vis spectroscopy, and titration to confirm identity, purity, and strength. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each 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 (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1% w/v
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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