Description

4-Amino-3-[(4-Aminophenyl)Azo]-1-Naphthalenesulfonic Acid Sodium Salt is a high-purity azo dye intermediate and chemical building block. This compound is valued for its precise molecular structure, which is critical for synthesizing specialized dyes and pigments with consistent color properties. It is primarily required by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced colorants and functional materials.

Application

• Primary Intermediate for the synthesis of acid dyes and direct dyes.
• Key Precursor in the production of pigments for inks, textiles, and plastics.
• Research Chemical for developing novel azo compounds with specific optical or electronic properties.
• Analytical Reagent in laboratory settings for colorimetric assays and testing.
• Specialty Dye Manufacturing for applications requiring high color strength and fastness.

Basic Information

Product Name	4-Amino-3-[(4-Aminophenyl)Azo]-1-Naphthalenesulfonic Acid Sodium Salt
CAS No.	72102-78-4
Molecular Formula	C16H13N5NaO3S
Molecular Weight	378.36 g/mol
Synonyms	Acid Red 4B Sodium Salt; 1-Naphthalenesulfonic acid, 4-amino-3-[(4-aminophenyl)azo]-, sodium salt; C.I. 23635; Sodium 4-amino-3-[(4-aminophenyl)azo]-1-naphthalenesulfonate; 4-Amino-3-(4-aminophenylazo)naphthalene-1-sulfonic acid sodium salt; Azoamine Scarlet Sodium Salt; 72102-78-4 (CAS)
EINECS	Contact for details

Quality Control

Our 4-Amino-3-[(4-Aminophenyl)Azo]-1-Naphthalenesulfonic Acid Sodium Salt is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We provide comprehensive Certificates of Analysis (COA) for each lot, detailing key parameters such as assay, impurity profile, and physical characteristics. Our quality management system is designed to meet the stringent requirements of industrial and research applications.

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 red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 3.0%
Solubility	Soluble in water

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