Description

p-[4,5-Dihydro-3-Methyl-4-[[4-Methyl-3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is a high-purity, synthetic organic compound belonging to the azo pyrazolone chemical class, valued for its specific chromophoric and functional properties. This compound is critical for B2B buyers requiring consistent quality and reliable supply for advanced manufacturing processes. It serves as a key intermediate or functional component for industries focused on specialty dyes, pigments, and advanced material science.

Application

• Specialty Dye & Pigment Intermediate: Primary use as a precursor in the synthesis of high-performance azo dyes and pigments for textiles, inks, and coatings.
• Functional Material Synthesis: Serves as a building block for creating advanced polymers and materials with specific light-absorption or chemical resistance properties.
• Research & Development: Utilized in chemical R&D for developing new chromophores, sensors, or photoactive compounds.
• Analytical Reagent: Potential use as a standard or reagent in analytical chemistry for method development and calibration.

Basic Information

Item	Details
Product Name	p-[4,5-Dihydro-3-Methyl-4-[[4-Methyl-3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	25739-67-7
Molecular Formula	C24H21N5O6S2
Molecular Weight	539.58 g/mol
Synonyms	Benzenesulfonic acid, p-[4,5-dihydro-3-methyl-4-[[4-methyl-3-[(phenylamino)sulfonyl]phenyl]azo]-5-oxo-1H-pyrazol-1-yl]-; 4-[4,5-Dihydro-3-methyl-4-[(4-methyl-3-[(phenylamino)sulfonyl]phenyl)azo]-5-oxo-1H-pyrazol-1-yl]benzenesulfonic acid; 1-(4-Sulfophenyl)-3-methyl-4-[(4-methyl-3-(phenylaminosulfonyl)phenyl)azo]-5-pyrazolone; Azo pyrazolone sulfonic acid derivative; CI 19140 (related class); Acid Yellow 23 related intermediate; Pyrazolone based sulfonated azo compound.
EINECS	Contact for details

Quality Control

Our p-[4,5-Dihydro-3-Methyl-4-[[4-Methyl-3-[(Phenylamino)Sulphonyl]Phenyl]Azo]-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles 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 minimize exposure to atmospheric humidity. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow to orange powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%

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