Description

Trisodium 4,5-Dihydro-5-Oxo-4-[[4-[[[3-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Amino]Carbonyl]Phenyl]Azo]-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate is a high-purity, water-soluble reactive dye intermediate of significant commercial importance. Its complex molecular structure, featuring multiple sulphonate groups, is engineered to deliver superior color fastness and brilliant hues in demanding applications. This compound is essential for manufacturers in the textile and specialty chemical industries seeking to produce advanced, high-performance dyes and pigments.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-grade reactive dyes used in cotton, wool, and nylon dyeing and printing.
• Textile Industry: Imparts bright, wash-fast colors with excellent stability to light and perspiration.
• Specialty Pigments: Used in the formulation of high-performance pigments for inks and coatings requiring specific solubility and ionic characteristics.
• Research & Development: Serves as a critical reagent in chemical R&D for developing novel chromophores and functional dyes.
• Paper Coloring: Potential application in the production of specialty colored papers where water solubility is an advantage.

Basic Information

Item	Detail
Product Name	Trisodium 4,5-Dihydro-5-Oxo-4-[[4-[[[3-[[2-(Sulphonatooxy)Ethyl]Sulphonyl]Phenyl]Amino]Carbonyl]Phenyl]Azo]-1-(4-Sulphonatophenyl)-1H-Pyrazole-3-Carboxylate
CAS No.	72187-36-1
Molecular Formula	C31H21N5Na3O16S4
Molecular Weight	942.76 g/mol (approx.)
Synonyms	Reactive Dye Intermediate 72187-36-1; Trisodium 1-(4-sulfophenyl)-4-[[4-[[[3-[(2-sulfooxyethyl)sulfonyl]phenyl]amino]carbonyl]phenyl]azo]-5-oxo-4,5-dihydro-1H-pyrazole-3-carboxylate; C.I. Reactive Yellow; Azo Pyrazolone Dye Intermediate; Water-soluble Reactive Dye Precursor; 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-[[4-[[[3-[(2-sulfooxyethyl)sulfonyl]phenyl]amino]carbonyl]phenyl]azo]-1H-pyrazole-3-carboxylic acid trisodium salt
EINECS	Contact for details

Quality Control

Our production of this reactive dye intermediate adheres to strict quality management systems to ensure batch-to-batch consistency and purity. Every lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and assay. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical 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 room temperature (15-25°C). Keep away from incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Solubility (in Water)	Clear Solution
Heavy Metals (as Pb)	≤ 20 ppm

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