Description

Sodium Hydrogen 4-Amino-5-Hydroxynaphthalene-1,6-Disulphonate is a high-purity, water-soluble aromatic sulfonate salt that serves as a critical intermediate in the synthesis of dyes and pigments. Its molecular structure provides the essential chromophore and auxochrome groups required for producing vivid, colorfast azo dyes. This compound is primarily utilized by manufacturers in the dyestuff, textile, and specialty chemical industries seeking reliable and consistent quality for their production processes.

Application

• Primary Intermediate for Azo Dyes: A key building block in the synthesis of acid dyes, direct dyes, and reactive dyes used for coloring wool, silk, nylon, and paper.
• Textile Industry: Essential for manufacturing dyes that offer excellent wash-fastness and light-fastness on natural and synthetic fibers.
• Pigment Production: Used in the preparation of lake pigments and organic pigments for inks, paints, and plastics.
• Research & Development: Serves as a standard or starting material in chemical research for developing new chromogenic compounds and functional materials.
• Specialty Chemical Synthesis: Acts as a sulfonating agent or precursor in the synthesis of more complex sulfonated aromatic compounds.

Basic Information

Product Name	Sodium Hydrogen 4-Amino-5-Hydroxynaphthalene-1,6-Disulphonate
CAS No.	40492-13-5
Molecular Formula	C₁₀H₈NNaO₇S₂
Molecular Weight	349.29 g/mol
Synonyms	4-Amino-5-hydroxy-1,6-naphthalenedisulfonic acid monosodium salt; 1,6-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, monosodium salt; 4-Amino-5-hydroxynaphthalene-1,6-disulfonic acid sodium salt; 6-Amino-5-hydroxynaphthalene-1,6-disulfonate; Sodium 4-amino-5-hydroxynaphthalene-1,6-disulfonate; Azo dye intermediate K; Acid dye intermediate
EINECS	Contact for details

Quality Control

Every batch of our Sodium Hydrogen 4-Amino-5-Hydroxynaphthalene-1,6-Disulphonate is produced under a stringent quality management system. We ensure compliance with relevant industry specifications for dye intermediates. Comprehensive testing includes identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and consistent quality for your manufacturing processes.

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 purity and performance.

Specification

Item	Specification
Appearance	Light beige to grayish powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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