Description

p-[4,5-Dihydro-3-Methyl-5-Oxo-4-(Phenylazo)-1H-Pyrazol-1-Yl]Benzenesulphonic Acid CAS NO 25739-63-3 is a specialized organic intermediate belonging to the phenylazopyrazole chemical class. This compound is valued for its role as a key building block in the synthesis of high-performance dyes and pigments, offering precise molecular architecture for color development. It is primarily sought by manufacturers in the fine chemicals, specialty dyes, and advanced materials sectors for research and production applications.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial precursor in the synthesis of vibrant and stable azo colorants used in textiles, inks, and plastics.
• Specialty Chemical Synthesis: Used in organic synthesis routes to create complex heterocyclic compounds for pharmaceutical and agrochemical research.
• Functional Material Development: Employed in the research and development of advanced materials, including light-sensitive or chromophoric polymers.
• Laboratory Reagent: Acts as a high-purity standard or reagent in analytical chemistry and quality control laboratories for dye-related industries.
• Photographic Chemicals: Potential application in the formulation of light-sensitive layers for specialized photographic processes.

Basic Information

Product Name	p-[4,5-Dihydro-3-Methyl-5-Oxo-4-(Phenylazo)-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	25739-63-3
Molecular Formula	C₁₇H₁₄N₄O₄S
Molecular Weight	370.38 g/mol
Synonyms	4-[4,5-Dihydro-3-methyl-5-oxo-4-(phenylazo)-1H-pyrazol-1-yl]benzenesulfonic acid; 4-(4,5-Dihydro-3-methyl-5-oxo-4-phenylazo-1H-pyrazol-1-yl)benzenesulfonic Acid; 1-(4-Sulfophenyl)-3-methyl-4-phenylazo-5-pyrazolone; Acid Yellow 117 (related dye class); Phenylazopyrazolone sulfonic acid; 4-(3-Methyl-5-oxo-4-phenylazo-4,5-dihydro-1H-pyrazol-1-yl)benzenesulfonic acid; 25739-63-3; Pyrazolone based sulfonic acid intermediate
EINECS	Contact for details

Quality Control

Our production of p-[4,5-Dihydro-3-Methyl-5-Oxo-4-(Phenylazo)-1H-Pyrazol-1-Yl]Benzenesulphonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via spectroscopic methods, to ensure consistency and meet precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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