Description

4,4'-[(1,8-Dihydroxy-3,6-Disulfo-2,7-Naphthalenediyl)Bis(Azo)]Bisbenzoic Acid is a high-purity, water-soluble azo dye intermediate characterized by its distinct molecular structure containing multiple functional groups. This compound matters for its role as a critical precursor in the synthesis of specialized dyes and pigments, offering excellent color fastness and complexing properties. Industrial manufacturers and R&D laboratories require it for producing advanced colorants used in textiles, inks, and functional materials where specific chromophoric and chelating behaviors are essential.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the manufacture of high-performance acid dyes, direct dyes, and metal-complex dyes.
• Textile Dyeing: Used in the synthesis of dyes for coloring wool, silk, nylon, and other polyamide fibers, providing vibrant shades and good wash-fastness.
• Ink & Toner Formulations: Employed in the production of colorants for specialty printing inks and electrophotographic toners.
• Functional Dyes: Potential applications in the development of dyes for biomedical staining, sensors, or light-harvesting materials due to its sulfonic acid and carboxylic acid groups.
• Research & Chemical Synthesis: A valuable reagent in organic synthesis and materials science research for constructing complex aromatic systems and studying azo chemistry.
• Metal Ion Indicator: Can be utilized in analytical chemistry as a chelating agent or colorimetric indicator for certain metal ions.

Basic Information

Product Name	4,4'-[(1,8-Dihydroxy-3,6-Disulfo-2,7-Naphthalenediyl)Bis(Azo)]Bisbenzoic Acid
CAS No.	24430-55-5
Molecular Formula	C24H14N4O12S2
Molecular Weight	614.52 g/mol
Synonyms	Acid Black 210; C.I. 28440; 4,4'-[(1,8-Dihydroxy-3,6-disulfo-2,7-naphthalene)bis(azo)]dibenzoic acid; Benzoic acid, 4,4'-[(1,8-dihydroxy-3,6-disulfo-2,7-naphthalenediyl)bis(azo)]bis-; 2,7-Naphthalenedisulfonic acid, 4,4'-(1,8-dihydroxy-2,7-naphthalenediyl)bis(azo)bis[benzoic acid] derivative
EINECS	Contact for details

Quality Control

Our production of 4,4'-[(1,8-Dihydroxy-3,6-Disulfo-2,7-Naphthalenediyl)Bis(Azo)]Bisbenzoic Acid adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and physical characteristics 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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials.

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	≤ 1.0%
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.