Description

Disodium 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-[(2-Phenoxyphenyl)Azo]Naphthalene-2,7-Disulphonate is a high-purity, synthetic azo dye intermediate known for its complex molecular structure and specific chromophoric properties. This compound matters for its role in producing vivid and stable colorants, particularly in applications requiring precise shade control and durability. It is primarily needed by manufacturers in the textile dyeing, ink formulation, and specialty pigment industries, where consistent quality and reliable performance are critical for end-product integrity.

Application

• Textile Dyeing: A key intermediate for synthesizing high-performance azo dyes used on natural and synthetic fibers like cotton, wool, and nylon.
• Ink Manufacturing: Used in the production of colorants for industrial printing inks, including packaging and security inks.
• Specialty Pigments: Serves as a precursor for creating organic pigments with specific color fastness and thermal stability properties.
• Leather Coloring: Employed in the formulation of dyes for the leather tanning and finishing industry.
• Paper Coloration: Used in the manufacture of dyes for specialty and decorative papers.
• Research & Development: Acts as a reference standard or building block in chemical research for novel chromophores and functional materials.

Basic Information

Product Name	Disodium 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-[(2-Phenoxyphenyl)Azo]Naphthalene-2,7-Disulphonate
CAS No.	5850-38-4
Molecular Formula	C34H22N6Na2O11S2
Molecular Weight	824.73 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(2-phenoxyphenyl)azo]naphthalene-2,7-disulfonate; 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[(4-nitrophenyl)azo]-6-[(2-phenoxyphenyl)azo]-, disodium salt; Azo Dye Intermediate 5850-38-4; Black 210 (Acid)
EINECS	Contact for details

Quality Control

Our production of Disodium 4-Amino-5-Hydroxy-3-[(4-Nitrophenyl)Azo]-6-[(2-Phenoxyphenyl)Azo]Naphthalene-2,7-Disulphonate adheres to stringent quality protocols to ensure batch-to-batch consistency and purity. The material undergoes rigorous analytical testing, including HPLC for assay and impurity profiling, to meet the specifications required for high-end industrial applications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and physical parameters is provided with every shipment.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Solubility (in Water)	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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