Description

4-Aminonaphthalene-1,5-Disulphonic Acid is a key aromatic sulfonic acid derivative, serving as a vital intermediate in the synthesis of high-value dyes and pigments. Its chemical structure, featuring both amino and sulfonic acid groups, makes it an essential building block for creating compounds with specific color properties and solubility. This product is primarily required by manufacturers in the dye and pigment, specialty chemical, and research sectors.

Application

• Dye and Pigment Intermediate: A crucial precursor for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring wool, silk, and nylon.
• Coupling Agent: Used in diazotization reactions to produce azo dyes and pigments with a range of colors from yellow to black.
• Chemical Synthesis Building Block: Employed in organic synthesis to introduce sulfonic acid groups and aromatic amine functionality into more complex molecules.
• Research & Development: Utilized in laboratory settings for developing new chromophores and functional materials.
• Specialty Chemical Production: Acts as an intermediate in the manufacture of optical brighteners and other performance chemicals.

Basic Information

Product Name	4-Aminonaphthalene-1,5-Disulphonic Acid
CAS No.	117-55-5
Molecular Formula	C₁₀H₉NO₆S₂
Molecular Weight	303.31 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 4-amino-; 4-Amino-1,5-naphthalenedisulfonic acid; 1-Amino-4,8-naphthalenedisulfonic acid; 4-Amino-1,5-NDSA; Chicago Acid; Amino Chicago Acid; 4,8-Diamino-1,5-naphthalenedisulfonic acid (related); 1,5-NADSA
EINECS	204-200-6

Quality Control

Our 4-Aminonaphthalene-1,5-Disulphonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent purity and meets the specifications required for industrial synthesis. A Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment.

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). Keep away from strong oxidizing agents and strong bases. The product may be hygroscopic; minimize exposure to atmospheric moisture during handling.

Specification

Item	Specification
Appearance	Off-white to light gray powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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