Description

1-Amino-8-Naphthol-4-Sulfonic Acid is a key aromatic sulfonic acid derivative that serves as a versatile intermediate in the synthesis of complex organic molecules. Its value lies in its bifunctional structure, containing both an amino and a hydroxyl group ortho to the sulfonic acid, which makes it a crucial building block for creating dyes and pigments. This compound is essential for manufacturers and R&D laboratories in the dyestuff, pharmaceutical, and specialty chemical industries seeking high-purity intermediates for advanced synthesis.

Application

• Primary Intermediate for Azo Dyes and Pigments: A fundamental coupling component for producing a wide range of acid, direct, and reactive dyes, imparting color and fastness properties.
• Pharmaceutical Synthesis: Used as a key starting material or intermediate in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Serves as a versatile building block in organic synthesis for creating novel compounds with specific functional groups.
• Specialty Chemical Manufacturing: Employed in the production of optical brighteners, corrosion inhibitors, and other performance chemicals.
• Analytical Reagent: Can be utilized in analytical chemistry as a reagent or standard for specific testing methodologies.

Basic Information

Product Name	1-Amino-8-Naphthol-4-Sulfonic Acid
CAS No.	83-64-7
Molecular Formula	C10H9NO4S
Molecular Weight	239.25 g/mol
Synonyms	1,8-Dihydroxynaphthalene-4-sulfonic acid, 4-Amino-5-hydroxy-1-naphthalenesulfonic acid; 8-Amino-1-naphthol-4-sulfonic acid; 4-Amino-1-naphthol-5-sulfonic acid; 1-Amino-8-hydroxy-4-naphthalenesulfonic acid; S-Acid; Chicago Acid
EINECS	201-494-0

Quality Control

Our production of 1-Amino-8-Naphthol-4-Sulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance with your quality requirements.

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 light-sensitive and easily oxidized nature, prolonged exposure to light and air should be minimized. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to grayish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
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.