Description

Sodium 4-[4-[(3-Chloro-2-Hydroxy-5-Nitrophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is a high-purity, synthetic azo dye intermediate essential for producing vibrant and stable colorants. This compound matters for its role in creating specific shades of yellow to orange with excellent light and wash fastness properties in demanding applications. It is primarily needed by manufacturers in the textile dyeing, leather finishing, and specialty ink industries who require consistent, high-performance color precursors for their formulations.

Application

• Textile Dyeing: A key intermediate for the synthesis of acid and direct dyes used on wool, silk, and nylon fabrics.
• Leather Processing: Used in the production of dyes for coloring leather goods, providing rich, durable colors.
• Specialty Inks: Serves as a precursor for pigments in inks requiring specific color properties and stability.
• Paper Coloring: Employed in the manufacture of dyes for high-grade paper and specialty packaging.
• Research & Development: Used as a standard or building block in chemical research for developing new dye molecules and studying azo chemistry.
• Biological Staining: Potential use as an intermediate for histochemical stains in laboratory settings.

Basic Information

Product Name	Sodium 4-[4-[(3-Chloro-2-Hydroxy-5-Nitrophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate
CAS No.	10132-99-7
Molecular Formula	C16H11ClN5NaO7S
Molecular Weight	475.80 g/mol
Synonyms	Acid Orange 67 (C.I. 14172); Benzenesulfonic acid, 4-[4-[(3-chloro-2-hydroxy-5-nitrophenyl)azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]-, sodium salt; Sodium 1-(4-sulfophenyl)-3-methyl-4-[(3-chloro-2-hydroxy-5-nitrophenyl)azo]-5-pyrazolone; C.I. 14172; Azo Orange Dye Intermediate; 3-Methyl-1-(4-sulfophenyl)-5-pyrazolone azo dye; 1-(4-Sulfophenyl)-3-methyl-4-[(3-chloro-2-hydroxy-5-nitrophenyl)azo]-5-pyrazolone sodium salt
EINECS	Contact for details

Quality Control

Our Sodium 4-[4-[(3-Chloro-2-Hydroxy-5-Nitrophenyl)Azo]-4,5-Dihydro-3-Methyl-5-Oxo-1H-Pyrazol-1-Yl]Benzenesulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, color strength, and impurity profiles typical for high-grade dye intermediates. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95.0%
Loss on Drying	Max. 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Water Solubility	Freely soluble

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