Description

5-Aminonaphthalene-1,3,6-Trisulfonic Acid is a high-purity, multi-sulfonated aromatic amine intermediate of significant industrial importance. This compound serves as a critical building block in the synthesis of advanced dyes, pigments, and optical brighteners, valued for its ability to introduce water-solubilizing sulfonic acid groups and a reactive amine site. It is essential for manufacturers and R&D laboratories in the specialty chemicals, textile dye, and fine chemical synthesis sectors seeking reliable, high-quality intermediates for complex organic transformations.

Application

• Primary Intermediate for Dyes and Pigments: A key precursor in the manufacture of acid dyes, direct dyes, and reactive dyes, particularly for coloring wool, silk, and nylon.
• Synthesis of Optical Brighteners (Fluorescent Whitening Agents): Used in the production of stilbene-based brighteners for paper, textiles, and detergents.
• Fine Chemical and Pharmaceutical Intermediate: The sulfonic acid and amine functionalities make it a versatile synthon for more complex sulfonated aromatic compounds used in various chemical syntheses.
• Research & Development: Employed in academic and industrial R&D for developing new chromophores, sensors, and functional materials.
• Potential Use in Electroplating Additives: May function as a brightener or leveling agent in specific electroplating bath formulations.

Basic Information

Product Name	5-Aminonaphthalene-1,3,6-Trisulfonic Acid
CAS No.	67900-43-0
Molecular Formula	C₁₀H₉NO₉S₃
Molecular Weight	383.37 g/mol
Synonyms	1,3,6-Naphthalenetrisulfonic acid, 5-amino-; 5-Amino-1,3,6-naphthalenetrisulfonic acid; 6-Amino-1,3,5-naphthalenetrisulfonic acid; H acid trisulfonic acid; 5-Amino-1-naphthol-3,6,8-trisulfonic acid; 1-Amino-8-naphthol-3,6-disulfonic acid trisulfonic acid derivative; 5-Amino-1-naphthalenesulfonic acid-3,6,8-trisulfonic acid
EINECS	Contact for details

Quality Control

Our 5-Aminonaphthalene-1,3,6-Trisulfonic Acid is produced under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) detailing key parameters such as assay (HPLC), sulfonic acid content, and impurity profiles are provided and available upon request, supporting your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and should be kept in a dry environment. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfonic Acid Content (Titration)	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm

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