Description

4-[(4-Aminophenyl)Azo]-4'-[(2,4-Dihydroxyphenyl)Azo][1,1'-Azobisnaphthalene]-6',7-Disulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate characterized by its complex polyazo structure and disulfonic acid functionality. This compound is critical for synthesizing specialized dyes and pigments that require excellent lightfastness and strong affinity for various substrates. It is primarily utilized by manufacturers in the textile, ink, and specialty chemical industries for producing high-performance colorants.

Application

• Textile Dye Intermediate: A key precursor for synthesizing acid dyes and direct dyes used on wool, silk, nylon, and paper.
• Functional Pigment Synthesis: Used in the production of pigments for inks, coatings, and plastics where specific color and stability properties are required.
• Biological Staining Agent: Serves as an intermediate for certain histochemical stains and indicators used in laboratory diagnostics.
• Analytical Chemistry Reagent: Employed as a chromogenic agent or complexometric indicator in specific titrimetric analyses.
• Research & Development: Used in academic and industrial R&D for developing new colorants, sensors, and functional materials.

Basic Information

Product Name	4-[(4-Aminophenyl)Azo]-4'-[(2,4-Dihydroxyphenyl)Azo][1,1'-Azobisnaphthalene]-6',7-Disulfonic Acid Disodium Salt
CAS No.	6856-11-7
Molecular Formula	C32H20N6Na2O8S2
Molecular Weight	750.64 g/mol
Synonyms	Acid Black 107; C.I. 15711; 1,1'-Azobisnaphthalene-6',7-disulfonic acid, 4-[(4-aminophenyl)azo]-4'-[(2,4-dihydroxyphenyl)azo]-, disodium salt; Disodium 4-[(4-aminophenyl)azo]-4'-[(2,4-dihydroxyphenyl)azo][1,1'-azobisnaphthalene]-6',7-disulfonate; Polyazo dye intermediate; Bis-azo naphthalene sulfonate
EINECS	Contact for details

Quality Control

Our production of 4-[(4-Aminophenyl)Azo]-4'-[(2,4-Dihydroxyphenyl)Azo][1,1'-Azobisnaphthalene]-6',7-Disulfonic Acid Disodium Salt adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, chemical identity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, impurity profile, and solubility are provided to guarantee traceability and compliance with your specifications.

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 nature, the container must be kept tightly sealed after each use 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%
Water Content	≤ 5.0%
Sulfated Ash	≤ 20.0%
Solubility (in Water)	Freely soluble

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