Description

7-Amino-1,3-Naphthalenedisulfonic Acid Monopotassium Salt is a high-purity, functionalized naphthalene derivative essential as a key intermediate in the synthesis of advanced dyes and pigments. Its disulfonic acid structure, stabilized as the monopotassium salt, provides excellent water solubility and reactivity for coupling reactions. This compound is primarily utilized by manufacturers in the colorant industry and research institutions developing specialized optical materials and chemical sensors.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a critical diazo component or coupling agent for producing acid dyes, direct dyes, and reactive dyes with specific color shades and fastness properties.
• Optical Brightener Synthesis: Used in the manufacture of fluorescent whitening agents (FWAs) for paper, textiles, and detergents.
• Chemical Sensor & Diagnostic Reagent Production: Acts as a building block for synthesizing chromogenic and fluorogenic substrates used in analytical chemistry and biomedical testing.
• Research & Development: Employed in organic synthesis for creating novel sulfonated aromatic compounds with potential applications in materials science.
• Specialty Chemical Manufacturing: Functions as an intermediate for corrosion inhibitors, dispersants, or other functional chemicals requiring a sulfonated naphthalene backbone.

Basic Information

Product Name	7-Amino-1,3-Naphthalenedisulfonic Acid Monopotassium Salt
CAS No.	842-15-9
Molecular Formula	C10H8KNO6S2
Molecular Weight	341.40 g/mol
Synonyms	7-Amino-1,3-naphthalenedisulfonic acid potassium salt; 1,3-Naphthalenedisulfonic acid, 7-amino-, monopotassium salt; 7-Amino-1,3-NDSA monopotassium salt; K salt of 7-Amino-1,3-naphthalenedisulfonic acid; 2-Amino-6,8-naphthalenedisulfonic acid monopotassium salt; 7-Amino-1,3-naphthalenedisulfonic acid monopotassium; Acid red precursor; Azo dye intermediate K
EINECS	212-667-5

Quality Control

Our production of 7-Amino-1,3-Naphthalenedisulfonic Acid Monopotassium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) detailing specifications such as assay, impurity profile, and physical characteristics are provided to guarantee traceability and compliance with your technical requirements.

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). Due to its hygroscopic nature, the container must be kept sealed to prevent moisture absorption, which can affect product stability and handling properties.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
pH (1% Solution)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	Contact for details

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