Description

4-[[4-[(2-Hydroxy-3,6-Disulpho-1-Naphthyl)Azo]-1-Naphthyl]Azo]Naphthalene-2,6-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble azo dye intermediate of significant commercial importance. Its value lies in its role as a key precursor for synthesizing complex, high-performance dyes and pigments, particularly those requiring excellent lightfastness and vivid coloration. This compound is essential for manufacturers in the textile, ink, and specialty chemical industries seeking to produce advanced colorants for demanding applications.

Application

• Primary Intermediate for Reactive Dyes: A critical building block in the synthesis of high-grade reactive dyes used for coloring cotton, wool, and other natural fibers.
• Manufacture of Acid Dyes: Used in the production of acid dyes for nylon, silk, and leather, providing strong, bright shades.
• Specialty Pigment Synthesis: Serves as a precursor for creating complex organic pigments with enhanced thermal and chemical stability for plastics and coatings.
• Inkjet and Digital Printing Inks: A key component in formulating advanced inks that require high color strength and durability.
• Biological Staining Reagents: Potential use in the synthesis of specialized stains for histological and cytological applications in laboratories.
• Research & Development: Employed in chemical R&D for developing novel chromophores and studying azo dye chemistry and properties.

Basic Information

Product Name	4-[[4-[(2-Hydroxy-3,6-Disulpho-1-Naphthyl)Azo]-1-Naphthyl]Azo]Naphthalene-2,6-Disulphonic Acid, Sodium Salt
CAS No.	83006-53-5
Molecular Formula	C30H16N4Na4O16S4
Molecular Weight	984.73 g/mol
Synonyms	Acid Black 210; C.I. 300310; 4-[[4-[(2-Hydroxy-3,6-disulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-1,5-naphthalenedisulfonic acid, tetrasodium salt; 1,5-Naphthalenedisulfonic acid, 4-[[4-[(2-hydroxy-3,6-disulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-, tetrasodium salt; Tetrasodium 4-[[4-[(2-hydroxy-3,6-disulfonato-1-naphthyl)azo]-1-naphthyl]azo]naphthalene-2,6-disulfonate; Azo dye intermediate 83006-53-5; Black 210 (Acid)
EINECS	Contact for details

Quality Control

Our production of this azo dye intermediate adheres to strict quality management protocols to ensure batch-to-batch consistency and high purity. Every lot is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation. A detailed Certificate of Analysis (COA) documenting all critical parameters is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled 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 or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 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.