Description

2-Naphthylamine-1,5-Disulfonic Acid Disodium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of advanced colorants and functional materials. Its disulfonated naphthylamine structure provides excellent coupling properties and solubility, making it a critical building block for high-performance dyes and pigments. This compound is primarily sought by manufacturers in the dyestuff, specialty chemical, and research sectors for producing vivid azo dyes, liquid crystal dyes, and biological stains.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key coupling component for synthesizing acid dyes, direct dyes, and reactive dyes used in textiles, leather, and paper.
• Specialty Dye Manufacturing: Production of high-value dyes for liquid crystal displays (LCDs), inks, and functional coatings.
• Biological Staining Agent Precursor: Used in the synthesis of certain histological and cytological stains for laboratory diagnostics.
• Chemical Research & Development: Serves as a versatile building block in organic synthesis for novel sulfonated aromatic compounds.
• Photographic Chemicals: Potential use in the synthesis of certain photographic color couplers and sensitizers.
• Corrosion Inhibitor Formulation: Component in the development of specialty corrosion inhibitors for industrial water systems.

Basic Information

Product Name	2-Naphthylamine-1,5-Disulfonic Acid Disodium Salt
CAS No.	62203-79-6
Molecular Formula	C10H7NNa2O6S2
Molecular Weight	371.27 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 2-amino-, disodium salt; 2-Amino-1,5-naphthalenedisulfonic acid disodium salt; Disodium 2-aminonaphthalene-1,5-disulfonate; Aminonaphthalenedisulfonic acid sodium salt; Acid Red 337 (related dye class); C.I. 17200 (intermediate); 2-Naphthylamine-1,5-disulfonate disodium; 1,5-Disulfo-2-naphthylamine disodium salt
EINECS	263-382-6

Quality Control

Our 2-Naphthylamine-1,5-Disulfonic Acid Disodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for sensitive synthesis applications. Certificates of Analysis (COA) detailing purity, impurity profile, and physical characteristics are provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect product stability and handling properties. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light beige crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfate Ash	28.0 - 32.0%
Solubility (in Water)	Clear, complete solution

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