Description

Disodium 4-Aminonaphthalene-2,6-Disulphonate is a high-purity, water-soluble aromatic intermediate characterized by its sulfonated naphthalene backbone. This compound is a critical building block in the synthesis of high-value dyes, pigments, and optical brighteners, offering excellent solubility and coupling properties. It is primarily utilized by manufacturers in the dye and pigment industry, as well as by research institutions developing advanced functional materials.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring textiles like wool, silk, and nylon.
• Optical Brightening Agent (OBA) Synthesis: Used in the manufacturing of stilbene-based fluorescent whitening agents for paper, detergents, and textiles.
• Chemical Research & Development: Serves as a versatile intermediate in organic synthesis for creating novel sulfonated aromatic compounds with specific functional properties.
• Specialty Chemical Manufacturing: Employed in the production of liquid crystal dyes, laser dyes, and other high-performance materials requiring a sulfonated naphthalene structure.

Basic Information

Product Name	Disodium 4-Aminonaphthalene-2,6-Disulphonate
CAS No.	68636-00-0
Molecular Formula	C10H7NNa2O6S2
Molecular Weight	347.26 g/mol
Synonyms	4-Amino-2,6-naphthalenedisulfonic acid disodium salt; 2,6-Naphthalenedisulfonic acid, 4-amino-, disodium salt; Disodium 4-amino-2,6-naphthalenedisulfonate; 4-Amino-2,6-NDS disodium salt; 2,6-Disulfo-4-aminonaphthalene disodium salt; Aminonaphthalene disulfonate sodium salt; C.I. Acid Yellow 1 intermediate
EINECS	Contact for details

Quality Control

Our Disodium 4-Aminonaphthalene-2,6-Disulphonate is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee 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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content	≤ 2.0%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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