Description

Sodium 2,5-Dichloro-4-[4,5-Dihydro-3-Methyl-4-[[4-[(p-Tolylsulphonyl)Oxy]Phenyl]Azo]-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is a high-purity, synthetic organic chemical compound, specifically a water-soluble azo dye intermediate. Its value lies in its role as a critical precursor for manufacturing high-performance, colorfast dyes and pigments used in demanding industrial applications. This product is essential for manufacturers in the textile, ink, and specialty coatings industries seeking consistent quality and reliable supply for their production processes.

Application

• Primary intermediate for the synthesis of azo disperse dyes and reactive dyes used in textile coloring.
• Key component in the production of high-performance pigments for plastics, inks, and industrial coatings.
• Used in research and development of novel functional dyes for non-textile applications, such as in optical materials.
• Employed in the manufacturing of specialty colorants for advanced materials and security printing.
• Serves as a standard reference material for quality control and analytical testing in dye manufacturing facilities.

Basic Information

Product Name	Sodium 2,5-Dichloro-4-[4,5-Dihydro-3-Methyl-4-[[4-[(p-Tolylsulphonyl)Oxy]Phenyl]Azo]-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate
CAS No.	67923-65-3
Molecular Formula	C23H17Cl2N4NaO7S2
Molecular Weight	619.42 g/mol
Synonyms	Benzenesulfonic acid, 2,5-dichloro-4-[4,5-dihydro-3-methyl-4-[[4-[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-5-oxo-1H-pyrazol-1-yl]-, sodium salt; Sodium 2,5-dichloro-4-(4,5-dihydro-3-methyl-5-oxo-4-((4-((p-tolylsulfonyl)oxy)phenyl)azo)-1H-pyrazol-1-yl)benzenesulfonate; Azo dye intermediate 67923-65-3; 1H-Pyrazole-1-benzenesulfonic acid, 4-[4,5-dihydro-3-methyl-4-[[4-[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-5-oxo-, sodium salt, 2,5-dichloro-; C.I. Azoic Diazo Component 48 (related).
EINECS	Contact for details

Quality Control

Our Sodium 2,5-Dichloro-4-[4,5-Dihydro-3-Methyl-4-[[4-[(p-Tolylsulphonyl)Oxy]Phenyl]Azo]-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent composition, and batch-to-batch reliability. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are available upon request 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). This product is hygroscopic (moisture-sensitive) and light-sensitive; therefore, containers must be kept tightly sealed after opening to minimize exposure to atmospheric moisture and light.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residual Solvents (GC)	Meets ICH guidelines

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