Description

Disodium 4-Amino-5-Hydroxy-3-[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate of significant commercial importance. Its complex, multi-azo structure is engineered to provide excellent color strength and specific light-fastness properties for demanding applications. This compound is primarily sought by manufacturers in the textile, ink, and specialty pigment industries for the production of high-performance dyes and colorants.

Application

• Textile Dyeing: A key intermediate for synthesizing reactive and direct dyes used on cotton, wool, and nylon fibers.
• Ink Formulation: Used in the manufacture of high-quality printing inks, including those for packaging and security printing.
• Specialty Pigments: Serves as a precursor for creating organic pigments with specific hue and stability requirements.
• Leather Coloring: Employed in the production of dyes for the uniform and durable coloring of leather goods.
• Paper Coloring: Used in the synthesis of dyes for coloring high-grade papers and paper products.
• Research & Development: A valuable chemical for R&D laboratories focusing on novel chromophores and dye chemistry.

Basic Information

Product Name	Disodium 4-Amino-5-Hydroxy-3-[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate
CAS No.	83846-56-4
Molecular Formula	C34H22N8Na2O10S2
Molecular Weight	812.75 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-amino-5-hydroxy-3,6-bis[[4-[(4-hydroxyphenyl)azo]phenyl]azo]-2,7-naphthalenedisulfonate; 4-Amino-5-hydroxy-3,6-bis(p-(p-hydroxyphenylazo)phenylazo)-2,7-naphthalenedisulfonic acid disodium salt; Azo Black Dye Intermediate; Tetrakis Azo Dye Intermediate; CAS 83846-56-4
EINECS	Contact for details

Quality Control

Our production of Disodium 4-Amino-5-Hydroxy-3-[[4-[(4-Hydroxyphenyl)Azo]Phenyl]Azo]-6-(Phenylazo)Naphthalene-2,7-Disulphonate adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot undergoes rigorous analytical testing, including HPLC for assay and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with every shipment to support your quality assurance processes.

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 when not in use to prevent absorption of atmospheric moisture, which may affect product performance.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
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.