Description

4-Aminonaphthalene-1,6-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble aromatic intermediate of significant commercial importance. Its core value lies in its dual sulphonic acid groups and primary amine functionality, making it a versatile building block for the synthesis of complex dyes and pigments. This compound is essential for manufacturers in the colorant industry seeking to produce vivid, lightfast, and wash-fast azo dyes and pigments.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a critical diazo component or coupling agent in the production of high-performance dyes for textiles, leather, and paper.
• Functional Dye Synthesis: Used in the manufacture of specialized dyes, including acid dyes, direct dyes, and reactive dyes, valued for their brightness and color strength.
• Fluorescent Whitening Agent (FWA) Precursor: Acts as a key starting material in the synthesis of optical brighteners used in detergents and paper products.
• Chemical Research & Development: Employed in organic synthesis laboratories for developing novel chromophores and functional materials.
• Pharmaceutical Intermediate: Potential use as a building block in the synthesis of certain sulfonamide-based active pharmaceutical ingredients (APIs).

Basic Information

Product Name	4-Aminonaphthalene-1,6-Disulphonic Acid, Sodium Salt
CAS No.	19574-33-5
Molecular Formula	C10H7NNa2O6S2
Molecular Weight	363.27 g/mol
Synonyms	6-Amino-1,5-naphthalenedisulfonic acid, disodium salt; 1,6-Cleve's acid, sodium salt; 4-Amino-1,6-naphthalenedisulfonic acid disodium salt; 6-Amino-1,5-naphthalenedisulfonic acid sodium salt; 1,5-Naphthalenedisulfonic acid, 6-amino-, disodium salt; Disodium 4-aminonaphthalene-1,6-disulphonate; 1,6-Cleve's Acid (sodium salt form); Aminonaphthalenedisulfonic acid sodium salt
EINECS	243-158-7

Quality Control

Our production of 4-Aminonaphthalene-1,6-Disulphonic Acid, Sodium Salt adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet the exacting standards of the dye and fine chemical industries. A detailed Certificate of Analysis (COA) is provided with each shipment, guaranteeing traceability and compliance with agreed specifications.

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). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed when not in use 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 (KF)	≤ 2.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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