Description

6-Aminonaphthalene-1,3-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble aromatic intermediate essential for synthesizing complex organic dyes and pigments. Its value lies in its dual sulfonic acid groups and primary amine functionality, which enable precise color development and strong substrate affinity in final products. This compound is a critical raw material for manufacturers in the dye, textile, and specialty chemical industries seeking reliable quality and consistent batch-to-batch performance.

Application

• Primary Intermediate for Azo Dyes and Pigments: Serves as a key coupling component in the production of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Fluorescent Brightening Agents (FBAs): Used in the synthesis of optical brighteners for detergents, papers, and plastics.
• Specialty Chemical Synthesis: Acts as a building block for pharmaceuticals, agrochemicals, and liquid crystal materials.
• Laboratory Research & Development: Employed as a standard or reagent in chemical research focusing on sulfonated naphthalene chemistry.

Basic Information

Product Name	6-Aminonaphthalene-1,3-Disulphonic Acid, Sodium Salt
CAS No.	83732-83-6
Molecular Formula	C10H7NNa2O6S2
Molecular Weight	371.27 g/mol
Synonyms	6-Amino-1,3-naphthalenedisulfonic acid, disodium salt; 1,3-Naphthalenedisulfonic acid, 6-amino-, disodium salt; 6-Amino-1,3-NDSA disodium salt; Koch Acid, sodium salt; 6-Amino-1,3-naphthalene disulfonate; Aminonaphthalene disulfonic acid sodium salt; 6-Amino-1,3-naphthalenedisulfonate
EINECS	Contact for details

Quality Control

Our 6-Aminonaphthalene-1,3-Disulphonic Acid, Sodium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting industry standards. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content	≤ 2.0%
Solubility (in Water)	Clear, complete solution
Heavy Metals (as Pb)	≤ 20 ppm

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