Description

1-Naphthylamine-7-Sulfonic Acid is a key aromatic sulfonic acid derivative, serving as a vital intermediate in the synthesis of high-value dyes and pigments. Its molecular structure provides the necessary coupling component and solubility properties for creating azo dyes with specific color fastness and hue characteristics. This compound is essential for manufacturers in the dye and pigment industry, as well as for research institutions developing novel colorants and functional organic materials.

Application

• Primary Intermediate for Azo Dyes: Acts as a crucial coupling component in the production of acid dyes, direct dyes, and other azo-based colorants for textiles, leather, and paper.
• Pigment Manufacturing: Used in the synthesis of organic pigments that require high thermal stability and lightfastness for inks, plastics, and coatings.
• Chemical Research & Development: Serves as a building block in organic synthesis for creating more complex sulfonated aromatic compounds and specialty chemicals.
• Photographic Chemicals: Can be utilized in the formulation of certain photographic developers and sensitizers.
• Corrosion Inhibitor Precursor: Potential use in the development of specialty corrosion inhibitors for industrial applications.

Basic Information

Product Name	1-Naphthylamine-7-Sulfonic Acid
CAS No.	119-28-8
Molecular Formula	C10H9NO3S
Molecular Weight	223.25 g/mol
Synonyms	7-Amino-1-naphthalenesulfonic Acid; 1,7-Cleve's Acid; 7-Amino-1-naphtholsulfonic Acid; 1-Naphthylamine-7-sulphonic Acid; 7-Amino-1-naphthalenesulphonic Acid; 1-Aminonaphthalene-7-sulfonic Acid; Cleve's Acid-1,7; 8-Aminonaphthalene-2-sulfonic Acid
EINECS	204-313-6

Quality Control

Our 1-Naphthylamine-7-Sulfonic Acid is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay, impurity profile, and physical characterization, to ensure it meets the high standards required for sensitive synthesis applications. A Certificate of Analysis (COA) detailing purity, identity, and specific test results is provided with every shipment to guarantee traceability and consistency for our B2B clients.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light gray powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in alkaline solutions

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