Description

Disodium 2-[[4-[[2-Amino-4-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo]-5-Nitrophenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate is a high-purity, water-soluble azo dye intermediate essential for producing vibrant and stable colorants. This compound is valued for its role in creating complex, high-performance dyes with excellent fastness properties. It is primarily required by manufacturers in the textile, leather, and specialty ink industries seeking reliable intermediates for quality dye synthesis.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon fibers.
• Leather Coloring: Used in the production of dyes for imparting deep, uniform colors to leather goods.
• Ink Manufacturing: Serves as a precursor for pigments and dyes used in specialty printing inks.
• Paper Dyeing: Employed in the formulation of dyes for coloring paper and paperboard products.
• Research & Development: Used as a standard or building block in chemical research for developing new chromophores and functional dyes.
• Biological Staining: Potential application as an intermediate for histological stains and indicators in analytical chemistry.

Basic Information

Item	Detail
Product Name	Disodium 2-[[4-[[2-Amino-4-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo]-5-Nitrophenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate
CAS No.	85959-27-9
Molecular Formula	C29H20N10Na2O11S2
Molecular Weight	794.63 g/mol
Synonyms	Acid Red 337 (Disodium salt); C.I. 17200; Disodium 5-[(4-aminophenyl)azo]-4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-2,7-naphthalenedisulfonate (alternative representation); 2-Naphthalenesulfonic acid, 5-[(4-aminophenyl)azo]-4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, disodium salt; Azo dye intermediate 85959-27-9; 1,3-Naphthalenedisulfonic acid, 7-[(4-aminophenyl)azo]-6-hydroxy-5-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, disodium salt; Reactive Red Dye Intermediate
EINECS	Contact for details

Quality Control

Our Disodium 2-[[4-[[2-Amino-4-[[4,5-Dihydro-3-Methyl-5-Oxo-1-(4-Sulphonatophenyl)-1H-Pyrazol-4-Yl]Azo]-5-Nitrophenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided to guarantee it meets your specific application requirements.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
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.