Description

2,7-Naphthalenedisulfonic Acid, 4-3,5-Bis(3-Amino-4-Nitrophenyl)Azo-2,4-Dihydroxyphenylazo-5-Hydroxy-, Disodium Salt is a high-purity, complex azo dye intermediate characterized by its specific sulfonic acid and disodium salt functional groups. This compound is valued for its role in synthesizing high-performance dyes and pigments with excellent color fastness and solubility properties. It is primarily sought after by manufacturers in the textile, ink, and specialty chemical industries for producing vivid and stable colorants.

Application

• Textile Dyeing: As a key intermediate for producing high-quality, wash-fast azo dyes for synthetic and natural fibers.
• Ink Formulation: Used in the synthesis of pigments for industrial printing inks, including packaging and security inks.
• Specialty Pigments: Serves as a precursor for creating complex organic pigments used in plastics, coatings, and automotive paints.
• Research & Development: Employed in chemical research for developing new chromophores and studying azo coupling reactions.
• Analytical Reagents: Can be utilized as a staining agent or a colorimetric indicator in specific laboratory analyses.

Basic Information

Product Name	2,7-Naphthalenedisulfonic Acid, 4-3,5-Bis(3-Amino-4-Nitrophenyl)Azo-2,4-Dihydroxyphenylazo-5-Hydroxy-, Disodium Salt
CAS No.	6473-02-5
Molecular Formula	C34H22N8O14S2Na2
Molecular Weight	884.76 g/mol
Synonyms	Acid Black 210; C.I. 300310; Disodium 4-[3,5-bis(3-amino-4-nitrophenyl)diazenyl]-2,4-dihydroxy-5-[2-(4-hydroxy-7-sulfonatonaphthalen-1-yl)diazenyl]benzenesulfonate; 2,7-Naphthalenedisulfonic acid, 4,4'-[3,3'-dinitro[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[5-hydroxy-, disodium salt; 1,5-Naphthalenedisulfonic acid, 3,3'-(3,3'-dinitro-4,4'-biphenylylene)bis(azo)bis[6-hydroxy-, disodium salt; C.I. Acid Black 210; Benzenesulfonic acid, 4-[3,5-bis(3-amino-4-nitrophenyl)azo]-2,4-dihydroxy-5-[2-(4-hydroxy-7-sulfo-1-naphthalenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our production of 2,7-Naphthalenedisulfonic Acid, 4-3,5-Bis(3-Amino-4-Nitrophenyl)Azo-2,4-Dihydroxyphenylazo-5-Hydroxy-, Disodium Salt adheres to stringent quality control protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against rigorous specifications, including identity confirmation, assay, and impurity profiling. Certificates of Analysis (COA) documenting all critical quality attributes are available upon request to support your quality assurance and regulatory needs.

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
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 20.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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