Description

4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-1-Naphthalenesulfonic Acid Sodium Salt is a high-purity, synthetic azo dye intermediate of significant industrial importance. Its complex molecular structure, featuring multiple azo linkages and amino groups, makes it a critical precursor for producing specialized, high-performance dyes and pigments. This compound is essential for manufacturers and R&D facilities in the colorant industry seeking to develop products with specific chromatic and fastness properties.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of complex, polyazo direct dyes, acid dyes, and reactive dyes, particularly for textile applications requiring deep shades and good wash fastness.
• Specialty Colorant Production: Used in manufacturing high-value dyes for niche markets, including dyes for leather, paper, and ink formulations where specific color characteristics are required.
• Research & Development: A valuable compound for chemical research focused on novel chromophore design, dye-sensitized solar cells (DSSCs), and non-linear optical materials due to its extended conjugated system.
• Analytical Chemistry Reagent: Can be utilized as a complexometric agent or a colorimetric indicator in specific analytical methodologies.

Basic Information

Product Name	4-Amino-3-[[4'-[(2,4-Diaminophenyl)Azo]-1,1'-Biphenyl-4-Yl]Azo]-1-Naphthalenesulfonic Acid Sodium Salt
CAS No.	6486-30-2
Molecular Formula	C34H26N8Na2O6S2 (Disodium salt form)
Molecular Weight	744.72 g/mol (Disodium salt form)
Synonyms	Direct Black 38 (Parent dye acid); C.I. 30235; Sodium 4-amino-3-{[4'-(2,4-diaminophenyl)diazenyl][1,1'-biphenyl]-4-yl}diazenylnaphthalene-1-sulfonate; 4-Amino-3-{[4'-(2,4-diaminophenyl)azo][1,1'-biphenyl]-4-yl}azo-1-naphthalenesulfonic acid disodium salt; Azoamine Black; Benzidine-based azo dye intermediate.
EINECS	Contact for details

Quality Control

Our production of this advanced dye intermediate adheres to strict quality management protocols. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet precise customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, impurity profile, and physical characteristics.

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 handling properties.

Specification

Item	Specification
Appearance	Dark brown to black powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (typical 97-99%)
Loss on Drying	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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