Description

Disodium Hydrogen 4,5-Dihydro-4-[[2-Methoxy-5-Methyl-4-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate is a high-purity, water-soluble anionic dye intermediate. It is valued for its role as a key precursor in the synthesis of reactive and direct dyes, offering excellent color strength and chromophore stability. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce vibrant and wash-fast colorants.

Application

• Primary Intermediate for Reactive Dyes: A crucial building block for synthesizing high-performance reactive dyes used in cotton and cellulose fiber dyeing.
• Direct Dye Synthesis: Used in the production of direct dyes for paper, leather, and textile applications requiring good substantivity.
• Specialty Ink Formulations: Serves as a colorant intermediate in the manufacture of inks for digital textile printing and other specialty printing processes.
• Research & Development: Employed in chemical R&D for developing novel azo-based dyes and functional colorants with specific properties.
• Functional Chemical Synthesis: Acts as a sulfonated intermediate for creating other sulfonate-containing specialty chemicals.

Basic Information

Product Name	Disodium Hydrogen 4,5-Dihydro-4-[[2-Methoxy-5-Methyl-4-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Azo]-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate
CAS No.	85005-98-7
Molecular Formula	C21H18N4Na2O13S3
Molecular Weight	692.52 g/mol
Synonyms	Reactive Red 198 (Intermediate); C.I. Reactive Red 198; Disodium 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[[4-[2-(sulfooxy)ethylsulfonyl]-2-methoxy-5-methylphenyl]azo]-1H-pyrazole-3-carboxylate; 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-4-[[2-methoxy-5-methyl-4-[[2-(sulfooxy)ethyl]sulfonyl]phenyl]azo]-5-oxo-1-(4-sulfophenyl)-, disodium salt; Levafix Red CA; Sumifix Red; Azo Pyrazolone Dye Intermediate
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 chemical 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 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 moisture absorption and potential degradation.

Specification

Item	Specification
Appearance	Reddish-brown to dark brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
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.