Description

4-[[4-[(3,6-Disulpho-1-Naphthyl)Azo]-1-Naphthyl]Azo]-3-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its complex polyazo structure with multiple sulphonic acid groups makes it a critical precursor for synthesizing vibrant and wash-fast dyes and pigments. This compound is essential for manufacturers in the textile, ink, and specialty coatings industries who require consistent quality and reliable supply for their production processes.

Application

• Primary Intermediate for Reactive Dyes: Key building block for synthesizing high-quality reactive dyes used in cotton and cellulose fiber dyeing.
• Production of Acid Dyes: Used in the manufacture of acid dyes for coloring wool, silk, and nylon.
• Direct Dye Synthesis: Serves as a crucial component in the production of direct dyes for paper and textile applications.
• Specialty Pigments and Inks: Employed in the formulation of high-performance pigments for inks, plastics, and coatings.
• Laboratory and R&D: Used as a standard or research chemical for developing new chromophores and dye molecules.
• Biological Staining: Potential use as an intermediate for histological stains and biological markers.

Basic Information

Product Name	4-[[4-[(3,6-Disulpho-1-Naphthyl)Azo]-1-Naphthyl]Azo]-3-Hydroxynaphthalene-2,7-Disulphonic Acid, Sodium Salt
CAS No.	83006-52-4
Molecular Formula	C30H16N4Na4O14S4
Molecular Weight	~ 912.7 g/mol
Synonyms	Acid Black 210; C.I. 300310; 4-[[4-[(3,6-Disulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-3-hydroxy-2,7-naphthalenedisulfonic acid, tetrasodium salt; Tetrasodium 4-[[4-[(3,6-disulphonato-1-naphthyl)azo]-1-naphthyl]azo]-3-hydroxynaphthalene-2,7-disulphonate; Azo Dye Intermediate Black 210; 1-Naphthalenesulfonic acid, 3,6-disulfo-4-[(4-[(3-hydroxy-2,7-disulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-, sodium salt (1:4)
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques like HPLC and spectrophotometry to confirm identity and strength. A comprehensive Certificate of Analysis (COA) detailing purity, impurity profile, and physical specifications is provided with every shipment to support your quality assurance systems.

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 and handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 95%
Moisture Content	Max. 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	Max. 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.