Description

2-Aminonaphthalene-1-Sulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of complex organic molecules. Its value lies in its bifunctional nature, featuring both an amine and a sulfonic acid group, which allows for selective reactions and the creation of water-soluble compounds. This product is essential for manufacturers in the dye, pigment, and pharmaceutical industries seeking to develop specialized azo dyes, fluorescent markers, and active pharmaceutical ingredients (APIs).

Application

• Primary intermediate for the synthesis of azo dyes and pigments, particularly for textiles and leather.
• Key building block in the production of fluorescent whitening agents (FWAs) and optical brighteners.
• Precursor for pharmaceutical intermediates and active ingredients requiring naphthalene-based structures.
• Used in research and development for creating specialty chemicals and functional materials.
• Intermediate in the manufacture of corrosion inhibitors and other performance chemicals.
• Starting material for analytical reagents and biochemical research tools.

Basic Information

Product Name	2-Aminonaphthalene-1-Sulfonic Acid
CAS No.	81-16-3
Molecular Formula	C10H9NO3S
Molecular Weight	223.25 g/mol
Synonyms	2-Naphthylamine-1-sulfonic Acid; Tobias Acid; 2-Amino-1-naphthalenesulfonic Acid; 1-Sulfo-2-naphthylamine; 2-Amino-1-naphthalenesulphonic Acid; β-Naphthylamine-α-sulfonic Acid; 2-Naphthalaminesulfonic Acid
EINECS	201-331-7

Quality Control

Our production of 2-Aminonaphthalene-1-Sulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. Each lot is analyzed against comprehensive specifications, including purity, identity, and impurity profiles. A Certificate of Analysis (COA) detailing all test results 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). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed to minimize exposure to atmospheric moisture and light to maintain product integrity.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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