Description

3-Amino-2,7-Naphthalenedisulfonic Acid Monosodium Salt is a high-purity, water-soluble aromatic intermediate of significant commercial importance. Its value lies in its bifunctional structure, serving as a versatile building block for the synthesis of complex dyes, pigments, and optical brighteners. This compound is essential for manufacturers in the dyestuff, specialty chemical, and research sectors seeking reliable, high-quality intermediates for advanced synthesis.

Application

• Primary Intermediate for Azo Dyes and Pigments: A key coupling component for producing vibrant, high-performance azo dyes used in textiles, inks, and plastics.
• Synthesis of Optical Brightening Agents (OBAs): Used in the manufacture of fluorescent whitening agents for paper, detergents, and textiles.
• Pharmaceutical Intermediate: Serves as a precursor in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Research & Development Chemical: Employed in organic synthesis and material science research for creating novel sulfonated compounds.
• Specialty Chemical Manufacturing: Acts as a building block for surfactants, liquid crystal materials, and other functional chemicals.

Basic Information

Product Name	3-Amino-2,7-Naphthalenedisulfonic Acid Monosodium Salt
CAS No.	5332-41-2
Molecular Formula	C₁₀H₈NNaO₆S₂
Molecular Weight	349.29 g/mol
Synonyms	3-Amino-2,7-naphthalenedisulfonic acid sodium salt; 2,7-Naphthalenedisulfonic acid, 3-amino-, monosodium salt; Acid Red 359; 3-Amino-2,7-NDSA monosodium salt; 2-Amino-6,7-naphthalenedisulfonic acid sodium salt (tautomer); Sodium 3-amino-2,7-naphthalenedisulfonate; 3-Amino-2,7-naphthalenedisulfonate sodium salt
EINECS	226-238-5

Quality Control

Our 3-Amino-2,7-Naphthalenedisulfonic Acid Monosodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets the high standards required for sensitive synthesis applications. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each 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). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility (1% in Water)	Clear, yellow to amber solution

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