Description

4-[[4-[[4-[(6-Amino-1-Hydroxy-3-Sulfo-2-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-7-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Tetrasodium Salt is a high-purity, water-soluble azo dye intermediate of significant industrial importance. Its complex polyazo structure, featuring multiple sulfonate groups, provides excellent solubility and binding affinity, making it a critical precursor for the synthesis of specialized dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty chemical sectors seeking to produce vivid, stable colors with specific technical properties.

Application

• Primary Intermediate for Reactive Dyes: A key building block in the synthesis of high-performance reactive dyes for cotton and other cellulosic fibers, offering excellent wash and light fastness.
• Production of Direct Dyes: Used in manufacturing direct dyes for paper, leather, and textile applications where deep, penetrating coloration is required.
• Specialty Ink Formulations: Serves as a precursor for pigments and dyes used in high-quality printing inks, including those for packaging and security printing.
• Functional Dye Synthesis: A starting material for creating functional dyes used in biological staining, sensitizers for solar cells, or other advanced material applications.
• Research & Development: Utilized in chemical R&D laboratories for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Item	Details
Product Name	4-[[4-[[4-[(6-Amino-1-Hydroxy-3-Sulfo-2-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-7-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Tetrasodium Salt
CAS No.	68310-70-3
Molecular Formula	C40H22N8O16S4 • 4Na
Molecular Weight	Approx. 1116.9 g/mol
Synonyms	Tetrasodium 4-[[4-[[4-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-7-sulphonato-1-naphthyl]azo]-7-sulphonato-1-naphthyl]azo]naphthalene-1-sulphonate; C.I. Azoic Diazo Component; Polyazo dye intermediate; Reactive Black 5 precursor; Tetrasodium salt of a tetra-azo dye acid; 1-Naphthalenesulfonic acid, 4-[[4-[[4-[(6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-7-sulfo-1-naphthalenyl]azo]-7-sulfo-1-naphthalenyl]azo]-, tetrasodium salt
EINECS	Contact for details

Quality Control

Our production of 4-[[4-[[4-[(6-Amino-1-Hydroxy-3-Sulfo-2-Naphthalenyl)Azo]-7-Sulfo-1-Naphthalenyl]Azo]-7-Sulfo-1-Naphthalenyl]Azo]-1-Naphthalenesulfonic Acid Tetrasodium Salt adheres to stringent quality protocols to ensure batch-to-batch consistency and purity for industrial synthesis. The material is characterized and controlled using advanced analytical techniques including HPLC, UV-Vis spectroscopy, and titration methods. Certificates of Analysis (COA) documenting purity, identity, and key physical-chemical parameters are provided with every shipment to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect handling and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Dark brown to black powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (as Tetrasodium Salt)
Moisture Content	≤ 5.0% (Karl Fischer)
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	Reported on COA

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