Description

Disodium 2-[[4-[[2-Hydroxy-5-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a key precursor for synthesizing reactive and direct dyes, which are essential for coloring textiles like cotton, wool, and nylon. This compound is critical for manufacturers in the dye and pigment industry, as well as for research institutions developing advanced colorants with specific fastness properties.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-quality reactive dyes used for cellulose fibers (cotton, viscose).
• Direct Dye Production: Used in the manufacture of direct dyes, which are applied to cotton, paper, and leather without a mordant.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments with specific color shades and properties.
• Textile Colorant Research: Employed in R&D laboratories for developing new dye molecules with improved light and wash fastness.
• Industrial Ink Formulation: Can be used in the production of colorants for certain types of industrial inks.
• Analytical Chemistry: May be utilized as a standard or reagent in analytical methods for dye identification and quantification.

Basic Information

Item	Detail
Product Name	Disodium 2-[[4-[[2-Hydroxy-5-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate
CAS No.	93803-40-8
Molecular Formula	C24H16N6Na2O11S2
Molecular Weight	690.58 g/mol
Synonyms	Acid Orange 116 (disodium salt); C.I. 23227; Disodium 5-[(4-[(2-hydroxy-5-[(4-nitro-2-sulfophenyl)amino]phenyl)azo]phenyl)amino]-2-nitrobenzenesulfonate; 2-Naphthalenesulfonic acid, 5-((4-((2-hydroxy-5-((4-nitro-2-sulfophenyl)amino)phenyl)azo)phenyl)amino)-, disodium salt; Reactive Orange Dye Intermediate; Azo Dye Intermediate 93803-40-8
EINECS	Contact for details

Quality Control

Our Disodium 2-[[4-[[2-Hydroxy-5-[(4-Nitro-2-Sulphonatophenyl)Amino]Phenyl]Azo]Phenyl]Amino]-5-Nitrobenzenesulphonate is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity and performance as a dye intermediate. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are provided and 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 after each use to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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