Description

Trisodium 2,4-Bis[[2,4-Diamino-5-[(3-Sulphonatophenyl)Azo]Phenyl]Azo]Benzenesulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its primary value lies in its role as a critical precursor for synthesizing specialized, high-performance dyes and pigments. This compound is essential for manufacturers in the textile, leather, and specialty ink industries seeking to produce vivid and stable colorants.

Application

• Primary Intermediate for Dye Synthesis: Serves as a key building block in the production of polyazo direct dyes and reactive dyes for cotton and cellulose fibers.
• Textile Dyeing: Used in the formulation of dyes that provide excellent wash and light fastness on textiles.
• Leather Coloring: Employed in the manufacture of dyes for achieving deep, uniform shades on leather goods.
• Paper and Pulp Coloring: A component in dyes used for tinting paper products and specialty papers.
• Ink Manufacturing: Utilized in the synthesis of pigments for specialty printing inks, including inks for packaging and security applications.
• Research & Development: Acts as a standard or reagent in chemical research focused on novel chromophores and dye chemistry.

Basic Information

Product Name	Trisodium 2,4-Bis[[2,4-Diamino-5-[(3-Sulphonatophenyl)Azo]Phenyl]Azo]Benzenesulphonate
CAS No.	6428-26-8
Molecular Formula	C36H24N12Na3O9S3
Molecular Weight	950.80 g/mol
Synonyms	Direct Black 22 (sodium salt); C.I. 35435; Benzenesulfonic acid, 2,4-bis[[2,4-diamino-5-[(3-sulfophenyl)azo]phenyl]azo]-, trisodium salt; Trisodium 2,4-bis((2,4-diamino-5-((3-sulfonatophenyl)diazenyl)phenyl)diazenyl)benzenesulfonate; Direct Black 22Na; C.I. Direct Black 22; 2,4-Bis[[2,4-diamino-5-[(3-sulfophenyl)azo]phenyl]azo]benzenesulfonic acid trisodium salt
EINECS	229-208-0

Quality Control

Our Trisodium 2,4-Bis[[2,4-Diamino-5-[(3-Sulphonatophenyl)Azo]Phenyl]Azo]Benzenesulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and performance characteristics. Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and solubility 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 after each use to prevent absorption of atmospheric moisture, which can affect product performance and handling.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
pH (1% Solution)	6.0 - 8.0

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