Description

p-[4,5-Dihydro-4-[(2-Hydroxy-5-Methyl-3-Nitrophenyl)Azo]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid is a specialized azo dye intermediate of significant commercial importance. It matters as a key precursor for synthesizing high-performance dyes and pigments, offering excellent color fastness and stability. Industrial manufacturers and R&D laboratories in the dye, textile, and specialty chemical sectors need this compound for developing vibrant and durable colorants.

Application

This advanced chemical intermediate is utilized in several high-value industrial processes:

• Primary intermediate for the synthesis of high-performance azo dyes and pigments, particularly for textile and fabric coloring.
• Manufacturing of specialty colorants for inks, coatings, and plastics requiring specific lightfastness and chemical resistance.
• Used in research and development of novel chromophores and functional dyes for advanced materials.
• Potential application in the production of analytical reagents and biological stains for laboratory use.
• Serves as a key building block in organic synthesis for creating complex molecules with specific optical properties.

Basic Information

Product Name	p-[4,5-Dihydro-4-[(2-Hydroxy-5-Methyl-3-Nitrophenyl)Azo]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid
CAS No.	93918-02-6
Molecular Formula	C17H15N5O7S
Molecular Weight	433.40 g/mol
Synonyms	Benzenesulfonic acid, p-[4,5-dihydro-4-[(2-hydroxy-5-methyl-3-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]-; 4-[4-(2-Hydroxy-5-methyl-3-nitrophenyl)azo-3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl]benzenesulfonic acid; 1-(4-Sulfophenyl)-3-methyl-4-[(2-hydroxy-5-methyl-3-nitrophenyl)azo]-5-pyrazolone; Azo dye intermediate 93918-02-6; CI 12715 (related); Acid Yellow dye intermediate; Pyrazolone-based sulfonic acid azo compound.
EINECS	Contact for details

Quality Control

Our production of p-[4,5-Dihydro-4-[(2-Hydroxy-5-Methyl-3-Nitrophenyl)Azo]-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonic Acid adheres to stringent quality management protocols. 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 and regulatory needs.

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 strong oxidizing agents and incompatible materials. Due to its complex organic structure, prolonged exposure to elevated temperatures or humidity should be avoided to maintain product integrity.

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%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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