Description

4-Aminoazobenzene-3,4'-Disulfonic Acid is a high-purity, water-soluble diazo component and intermediate of significant commercial importance. Its bifunctional sulfonic acid groups and aromatic amine structure make it a versatile precursor for the synthesis of dyes, pigments, and specialty colorants. This compound is primarily sought after by manufacturers in the textile dyeing, ink formulation, and analytical chemistry sectors for producing vivid, stable colors and as a reagent in chromatographic applications.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring textiles like wool, silk, and nylon.
• Specialty Ink Manufacturing: Used in the production of high-performance inks for packaging, security printing, and digital textiles.
• Analytical Reagent & Chromatography: Serves as a standard or derivatization agent in analytical methods, including liquid chromatography (HPLC).
• Research & Chemical Synthesis: Employed in organic synthesis and pharmaceutical research to create complex molecules and study azo coupling reactions.
• Functional Material Precursor: Potential use in the development of photoactive materials, sensors, and light-harvesting complexes due to its chromophoric structure.

Basic Information

Product Name	4-Aminoazobenzene-3,4'-Disulfonic Acid
CAS No.	101-50-8
Molecular Formula	C₁₂H₁₁N₃O₆S₂
Molecular Weight	357.36 g/mol
Synonyms	4-Aminoazobenzene-3,4'-disulfonic acid; 3,4'-Diaminoazobenzene-3',4-disulfonic acid; Acid Yellow 36 intermediate; C.I. 13065; 4-(4-Aminophenyl)diazenyl-2-aminobenzenesulfonic acid; 4-Aminoazobenzene-3,4'-disulphonic acid; 4-Aminoazobenzene-3,4'-disulfonate; Azoic Diazo Component 12
EINECS	202-951-8

Quality Control

Our production of 4-Aminoazobenzene-3,4'-Disulfonic Acid adheres to stringent quality management protocols. Every batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A detailed Certificate of Analysis (COA) is provided with each shipment, guaranteeing traceability, consistency, and compliance with relevant global regulatory frameworks.

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). Keep away from strong oxidizing agents and incompatible materials. The compound is light-sensitive; prolonged exposure to light should be avoided to maintain stability.

Specification

Item	Specification
Appearance	Yellow to orange-brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility	Soluble in water and alkaline solutions

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