Description

2-Amino-1-Naphthalenesulfonic Acid Sodium Salt is a high-purity, water-soluble sodium salt derivative of a key naphthalene-based intermediate. This compound matters as a versatile building block for synthesizing azo dyes, pigments, and other complex organic molecules where the sulfonate group enhances solubility and the amino group provides a site for diazotization and coupling reactions. It is essential for manufacturers and R&D laboratories in the dye and pigment, pharmaceutical, and specialty chemical industries seeking reliable, high-quality intermediates for their production processes.

Application

• Primary intermediate in the synthesis of azo dyes and pigments, contributing to color development and stability.
• Key starting material for the production of fluorescent whitening agents (optical brighteners) used in paper, textiles, and detergents.
• Building block in pharmaceutical research for creating sulfonamide-based compounds and other active pharmaceutical ingredients (APIs).
• Used in the manufacture of specialty surfactants and corrosion inhibitors due to its anionic sulfonate group.
• Intermediate for analytical reagents and biochemical research tools.
• Potential use in the synthesis of liquid crystal materials and other advanced organic electronic components.

Basic Information

Product Name	2-Amino-1-Naphthalenesulfonic Acid Sodium Salt
CAS No.	25293-52-1
Molecular Formula	C10H8NNaO3S
Molecular Weight	245.23 g/mol
Synonyms	1-Aminonaphthalene-4-sulfonic acid sodium salt; Tobias acid sodium salt; 4-Amino-1-naphthalenesulfonic acid sodium salt; 2-Naphthylamine-1-sulfonic acid sodium salt; Sodium 1-amino-4-naphthalenesulfonate; Sodium 4-amino-1-naphthalenesulfonate; 1,4-Cleve's acid sodium salt; Sodium 2-aminonaphthalene-1-sulfonate
EINECS	Contact for details

Quality Control

Our 2-Amino-1-Naphthalenesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting specifications for industrial and research applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, 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, 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 absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Solubility (1% in Water)	Clear, yellow solution

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