Description

2,5-dichloro-4-[4-[[5-[[3-chloro-3-(phenylsulphonyl)propionyl]amino]-2-sulphophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid, sodium salt is a high-purity, complex azo dye intermediate designed for advanced chemical synthesis. This compound matters for its role as a critical building block in the production of specialized dyes and pigments, offering precise color properties and structural integrity. Industrial manufacturers in the textile, ink, and specialty chemical sectors require this material for developing high-performance colorants with specific fastness and application characteristics.

Application

• Primary Intermediate for Reactive Dyes: A key precursor in the synthesis of high-quality reactive dyes for cotton and cellulose fiber dyeing.
• Specialty Pigment Manufacturing: Used in the production of complex organic pigments for inks, coatings, and plastics requiring specific chromaticity and stability.
• Textile Colorant Synthesis: Essential for creating dyes with excellent wash-fastness, light-fastness, and chemical resistance for the textile industry.
• Functional Dye Development: Serves as a starting material for dyes used in non-textile applications, such as paper coloring or functional materials.
• Research & Development: Utilized in R&D laboratories for developing novel chromophores and studying structure-property relationships in dye chemistry.

Basic Information

Product Name	2,5-dichloro-4-[4-[[5-[[3-chloro-3-(phenylsulphonyl)propionyl]amino]-2-sulphophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid, sodium salt
CAS No.	83399-70-6
Molecular Formula	C26H19Cl3N5O9S3Na
Molecular Weight	802.06 g/mol (as sodium salt)
Synonyms	Sodium 2,5-dichloro-4-[4-[[5-[[3-chloro-3-(phenylsulfonyl)propanoyl]amino]-2-sulfophenyl]diazenyl]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulfonate; Reactive Dye Intermediate 83399-70-6; Azo Pyrazole Sulfonic Acid Sodium Salt; 1,3-Benzenedisulfonic acid, 4,6-dichloro-2-[4-[[5-[[(3-chloro-3-oxo-1-(phenylsulfonyl)propyl]amino]-2-sulfophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-, sodium salt (1:?); CI Reactive Orange 84 intermediate; Tetrasodium 5-[[4-chloro-6-[[5-[[2-chloro-2-(phenylsulfonyl)acetyl]amino]-2-sulfophenyl]azo]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[4-[[2-(sulfonatooxy)ethyl]sulfonyl]phenyl]azo]-2,7-naphthalenedisulfonate (related compound); Benzenesulfonic acid, 2,5-dichloro-4-[4-[[5-[[3-chloro-3-(phenylsulfonyl)-1-oxopropyl]amino]-2-sulfophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-, sodium salt.
EINECS	Contact for details

Quality Control

Our production of 2,5-dichloro-4-[4-[[5-[[3-chloro-3-(phenylsulphonyl)propionyl]amino]-2-sulphophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonic acid, sodium salt adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity for industrial synthesis. The material is manufactured under a quality system aligned with ISO 9001 standards, with critical parameters verified via advanced analytical techniques including HPLC, IR, and titration. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance needs.

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 tightly sealed after each use to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder or crystalline solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0% (by area normalization)
Loss on Drying	≤ 5.0%
Sulfated Ash	Reported on COA
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility (1% in Water)	Clear to slightly hazy solution

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