Description

4-(4-Amino-1-Naphthylazo)Benzenesulphonic Acid is an important azo dye intermediate characterized by its distinct aromatic and sulfonic acid structure. This compound is valued for its role in synthesizing high-value, colorfast dyes and pigments, particularly in applications requiring specific hue and stability properties. It is primarily utilized by manufacturers in the dye and pigment, textile, and specialty chemical industries for the production of complex colorants.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a key building block in the synthesis of complex, high-performance azo dyes, especially for shades of red, brown, and black.
• Textile Dyeing: Used in the manufacturing of dyes for coloring natural and synthetic fibers, including cotton, wool, and nylon.
• Specialty Ink Formulation: Employed in the production of pigments for inks used in printing and packaging where specific color properties are required.
• Research & Development: Acts as a valuable reagent in chemical research for developing new chromophores and studying azo coupling reactions.
• Functional Dye Synthesis: Potential use in creating dyes for non-textile applications, such as in lasers or optical data storage.

Basic Information

Product Name	4-(4-Amino-1-Naphthylazo)Benzenesulphonic Acid
CAS No.	3713-23-3
Molecular Formula	C16H13N3O3S
Molecular Weight	327.36 g/mol
Synonyms	4-[(4-Amino-1-naphthyl)azo]benzenesulfonic acid; 1-Amino-4-(4-sulfophenylazo)naphthalene; C.I. 37175; Acid Black 52 intermediate; 4-Amino-1-(4-sulfophenylazo)naphthalene; Benzenesulfonic acid, 4-[(4-amino-1-naphthalenyl)azo]-; 1-Naphthalenamine, 4-[(4-sulfophenyl)azo]-
EINECS	223-055-8

Quality Control

Our production of 4-(4-Amino-1-Naphthylazo)Benzenesulphonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. Each lot is analyzed against established specifications using advanced analytical techniques such as HPLC and titration. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with every shipment to support your quality assurance processes.

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 incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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