Description

4-Amino(Phenylazo)Naphthalene-1-Sulphonic Acid is a specialized azo dye intermediate characterized by its distinct aromatic and sulfonic acid structure. This compound is valued for its role as a key precursor in synthesizing high-performance dyes and pigments, offering excellent color properties and structural versatility. It is primarily required by manufacturers in the dye and pigment industry, as well as by research institutions focused on advanced material science and organic synthesis.

Application

• Primary Intermediate for Azo Dyes: Serves as a crucial building block for the synthesis of various orange, red, and brown azo dyes.
• Textile Dyeing: Used in the production of dyes for coloring natural and synthetic fibers like cotton, wool, and nylon.
• Pigment Manufacturing: Acts as a precursor for organic pigments used in inks, paints, and plastics.
• Research & Development: Employed in academic and industrial R&D for studying azo compound chemistry and developing new colorants.
• Specialty Chemical Synthesis: Utilized as a starting material for more complex sulfonated aromatic compounds with specific functional properties.

Basic Information

Product Name	4-Amino(Phenylazo)Naphthalene-1-Sulphonic Acid
CAS No.	71412-01-6
Molecular Formula	C₁₆H₁₃N₃O₃S
Molecular Weight	327.36 g/mol
Synonyms	4-Amino-1-(phenylazo)naphthalene-1-sulfonic acid; 1-Naphthalenesulfonic acid, 4-amino-1-(phenylazo)-; 4-Amino-1-(phenylazo)-1-naphthalenesulfonic acid; 1-(Phenylazo)-4-amino-1-naphthalenesulfonic acid; C.I. Acid Orange 33 intermediate; Azo dye intermediate OA; 4-Amino-1-phenylazonaphthalene-1-sulfonic acid
EINECS	Contact for details

Quality Control

Our 4-Amino(Phenylazo)Naphthalene-1-Sulphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. Certificates of Analysis (COA) detailing specifications such as assay, impurity profile, and physical characteristics are available upon request to support your quality assurance protocols.

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.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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