Description

Tetrasodium 5-[[6-[(3-aminobenzoyl)amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]-6-ethoxy-8-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthalene-2-sulphonate is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure, featuring multiple sulphonate groups, provides excellent solubility and binding affinity, making it a critical precursor for high-performance dyes. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries seeking to produce vivid, stable colors with enhanced fastness properties.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes for cotton, wool, and nylon, offering excellent wash and light fastness.
• Inkjet Inks: Used in the production of high-quality pigment inks for commercial and industrial printing, ensuring color intensity and stability.
• Leather Coloring: Employed in the formulation of dyes for leather finishing, providing deep, uniform shades.
• Paper Dyeing: Suitable for coloring high-grade papers and specialty packaging materials.
• Biological Staining: Potential use as a precursor for histological stains in laboratory settings.
• Functional Dyes: Serves as a building block for dyes used in optical data storage, LCD color filters, and other advanced materials.

Basic Information

Item	Details
Product Name	Tetrasodium 5-[[6-[(3-aminobenzoyl)amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]-6-ethoxy-8-[[7-sulphonato-4-[(3-sulphonatophenyl)azo]naphthyl]azo]naphthalene-2-sulphonate
CAS No.	6428-19-9
Molecular Formula	C49H32N8Na4O19S5
Molecular Weight	Approx. 1300.0 g/mol (Contact for exact details)
Synonyms	Direct Black 22 (Tetrasodium Salt); C.I. 35435; Tetrasodium 8-Acetamido-2-phenylazo-1-naphthol-3,6-disulfonate-5-[[4-[(2,5-disulfophenyl)azo]-1-naphthyl]azo] Derivative; Azo Black T; Polyazo Black Dye Intermediate; 6428-19-9; CAS 6428-19-9
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to stringent quality control protocols to ensure batch-to-batch consistency and purity for your synthesis processes. Quality is verified through advanced analytical techniques including HPLC, UV-Vis spectroscopy, and elemental analysis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance and regulatory compliance.

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). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture which may affect performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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