Description

7-Aminonaphthalene-1,3-Disulfonic Acid, Potassium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of advanced colorants and functional dyes. Its disulfonic acid structure, rendered soluble and stable as the potassium salt, provides crucial coupling sites and chromophoric properties for demanding applications. This compound is a critical raw material for manufacturers in the dyestuff, pigment, and specialty chemical industries seeking reliable quality and consistent 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.
• Synthesis of Food Colorants: Used in the manufacturing chain of certain certified food dyes, where high purity is paramount.
• Production of Optical Brightening Agents (OBAs): Acts as a precursor in the synthesis of fluorescent whitening agents used in detergents and papers.
• Functional Dye Intermediate: Employed in the creation of specialized dyes for inks, lasers, and other high-tech applications.
• Laboratory Reagent and Research Chemical: Used in organic synthesis and chemical research for developing novel aromatic compounds.

Basic Information

Product Name	7-Aminonaphthalene-1,3-Disulfonic Acid, Potassium Salt
CAS No.	18589-26-9
Molecular Formula	C10H7K2NO6S2
Molecular Weight	403.49 g/mol
Synonyms	7-Amino-1,3-naphthalenedisulfonic acid dipotassium salt; 1,3-Naphthalenedisulfonic acid, 7-amino-, dipotassium salt; K salt of 7-Amino-1,3-naphthalenedisulfonic acid; 7-Amino-1,3-NDSA dipotassium salt; 2-Naphthylamine-4,8-disulfonic acid potassium salt; 7-Aminonaphthalene-1,3-disulfonate dipotassium; Acid Red 359 intermediate
EINECS	Contact for details

Quality Control

Our 7-Aminonaphthalene-1,3-Disulfonic Acid, Potassium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and performance. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee traceability and compliance with your quality requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The material is hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light gray powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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