Description

5-Aminonaphthalene-2-Sulphonic Acid is a high-purity aromatic sulfonic acid derivative, serving as a critical intermediate in advanced organic synthesis. Its value lies in its bifunctional nature, providing both an amine and a sulfonic acid group for coupling and functionalization reactions. This compound is essential for manufacturers in the dye, pigment, and pharmaceutical industries seeking to develop specialized chemical products.

Application

• Primary intermediate for the synthesis of azo dyes and pigments, particularly for producing vibrant, lightfast colors.
• Key building block in pharmaceutical research for creating sulfonamide-based active pharmaceutical ingredients (APIs).
• Used in the production of optical brighteners and fluorescent whitening agents for paper and textiles.
• Acts as a corrosion inhibitor precursor in specialty chemical formulations for industrial processes.
• Employed in analytical chemistry as a derivatization agent or a standard for method development.
• Intermediate for functional polymers and materials science applications requiring sulfonated aromatic structures.

Basic Information

Item	Detail
Product Name	5-Aminonaphthalene-2-Sulphonic Acid
CAS No.	51548-48-2
Molecular Formula	C10H9NO3S
Molecular Weight	223.25 g/mol
Synonyms	5-Amino-2-naphthalenesulfonic acid; 2-Naphthylamine-5-sulfonic acid; 6-Amino-1-naphthalenesulfonic acid; 1-Naphthylamine-6-sulfonic acid; 5-Amino-2-naphthalenesulphonic acid; 2-Amino-5-naphthalenesulfonic acid; 5-Amino-2-naphthalenesulphonate; 5-Amino-2-naphthalenesulfonate
EINECS	Contact for details

Quality Control

Our 5-Aminonaphthalene-2-Sulphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets the high-purity standards required for industrial and research applications. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

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 after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Sulfated Ash	≤ 0.5%

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