Description

3-[(4,5-Dihydro-5-Oxo-1,3-Diphenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxy-5-Nitrobenzenesulphonic Acid is a specialized azo dye intermediate known for its distinct chromophoric structure, which is critical for producing vibrant and stable colorants. This compound matters to manufacturers seeking high-performance, light-fast pigments and dyes for demanding industrial applications. It is primarily needed by producers in the textile, ink, and specialty coatings industries, where precise color properties and chemical stability are paramount.

Application

• Primary Intermediate for High-Performance Azo Dyes & Pigments: Serves as a key building block in the synthesis of complex, high-value azo colorants.
• Textile Dyeing: Used in the production of dyes for synthetic and natural fibers, offering good wash and light fastness.
• Ink Formulation: Employed in the manufacture of printing inks, including those for packaging and publications, due to its color strength.
• Industrial Coatings & Paints: A component in creating pigments for automotive, architectural, and industrial coatings requiring durability.
• Plastics and Polymers Coloring: Utilized to impart color to various plastic resins and polymer matrices during production.
• Research & Development: Acts as a valuable chemical entity in organic synthesis and material science research for novel chromophores.

Basic Information

Product Name	3-[(4,5-Dihydro-5-Oxo-1,3-Diphenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxy-5-Nitrobenzenesulphonic Acid
CAS No.	64743-14-2
Molecular Formula	C21H15N5O7S
Molecular Weight	481.44 g/mol
Synonyms	5-Nitro-2-hydroxy-3-[(1,3-diphenyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)azo]benzenesulfonic acid; 3-[(4,5-Dihydro-5-oxo-1,3-diphenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitrobenzenesulfonic acid; Benzenesulfonic acid, 3-[(4,5-dihydro-5-oxo-1,3-diphenyl-1H-pyrazol-4-yl)azo]-2-hydroxy-5-nitro-; Azo dye intermediate 64743-14-2; 1H-Pyrazole-4-sulfonic acid derivative; C.I. Acid Orange 67 related intermediate
EINECS	Contact for details

Quality Control

Our 3-[(4,5-Dihydro-5-Oxo-1,3-Diphenyl-1H-Pyrazol-4-Yl)Azo]-2-Hydroxy-5-Nitrobenzenesulphonic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity, consistent chromophore strength, and batch-to-batch reproducibility suitable for industrial synthesis. 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 room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
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.