Description

Trisodium 8-[[4'-[(2-Amino-8-Hydroxy-6-Sulphonato-1-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonate is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex, multi-sulfonated structure provides excellent substantivity and chromophoric properties, making it a critical precursor for synthesizing high-value, colorfast dyes. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors who require reliable intermediates for producing vibrant and durable colors.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton, viscose, and other cellulosic fibers.
• Production of Acid Dyes: Used in the manufacture of acid dyes for coloring wool, silk, and nylon, offering good light and wash fastness.
• Specialty Ink Formulations: Serves as a colorant precursor in high-quality inks for packaging, security printing, and digital applications.
• Functional Dye Synthesis: A starting material for creating functional dyes used in optical data storage, liquid crystal displays (LCDs), and laser applications.
• Research & Development: Utilized in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Item	Details
Product Name	Trisodium 8-[[4'-[(2-Amino-8-Hydroxy-6-Sulphonato-1-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonate
CAS No.	73398-47-7
Molecular Formula	C40H25N5Na3O13S3
Molecular Weight	~956.80 g/mol
Synonyms	Acid Black 234 (C.I. 300204); Trisodium 8-[[4'-[(2-amino-8-hydroxy-6-sulfo-1-naphthyl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-7-hydroxynaphthalene-1,3-disulfonate; C.I. 300204; Reactive Black 5 related intermediate; Azo dye intermediate 73398-47-7; Tetrasodium? 8,8'-[[3,3'-dimethyl[1,1'-biphenyl]-4,4'-diyl]bis(azo)]bis[7-hydroxy-1,3-naphthalenedisulfonate] derivative; Light-sensitive azo dye intermediate.
EINECS	Contact for details

Quality Control

Our production of Trisodium 8-[[4'-[(2-Amino-8-Hydroxy-6-Sulphonato-1-Naphthyl)Azo]-3,3'-Dimethyl[1,1'-Biphenyl]-4-Yl]Azo]-7-Hydroxynaphthalene-1,3-Disulphonate adheres to a stringent quality management system to ensure batch-to-batch consistency and purity. Each lot undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation. Certificates of Analysis (COA) detailing assay, impurity profile, and physical characteristics are provided with every shipment 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 ambient temperature (15-25°C). Keep away from incompatible materials such as strong oxidizing agents. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Water Content	Max. 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	Max. 20 ppm
Solubility (in Water)	Freely soluble

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