Description

4-Aminonaphthalene-1,6-Disulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile and critical intermediate in the synthesis of high-value colorants and functional chemicals. Its bifunctional structure, featuring both an amino group and two sulfonic acid groups, makes it indispensable for creating complex molecules with specific solubility and chromophoric properties. This compound is primarily sought after by manufacturers in the dye and pigment industries, as well as by research institutions developing advanced materials and biochemical reagents.

Application

• Dye and Pigment Intermediate: A crucial building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for coloring wool, silk, nylon, and paper.
• Fluorescent Brightening Agent (FBA) Production: Used in the manufacture of optical brighteners for textiles, detergents, and plastics.
• Pharmaceutical Intermediate: Serves as a precursor in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Research & Development: Employed in organic synthesis and materials science research to create novel conjugated systems and functional polymers.
• Chemical Synthesis: Acts as a starting material or intermediate for producing other specialty chemicals, including corrosion inhibitors and complexing agents.

Basic Information

Product Name	4-Aminonaphthalene-1,6-Disulfonic Acid
CAS No.	85-75-6
Molecular Formula	C₁₀H₉NO₆S₂
Molecular Weight	303.31 g/mol
Synonyms	6-Amino-1-naphthalenesulfonic acid-4-sulfonic acid; 1,6-Cleve's acid; 4-Amino-1,6-naphthalenedisulfonic acid; 6-Amino-1-naphthol-3-sulfonic acid (tautomer); Cleve's 1,6-Acid; 1-Naphthylamine-4,7-disulfonic acid; 4-Amino-1-naphthalenesulfonic acid-6-sulfonic acid; 6-Amino-1-naphthalenesulfonic acid
EINECS	201-627-8

Quality Control

Our production of 4-Aminonaphthalene-1,6-Disulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed against comprehensive specifications using advanced techniques like HPLC and titration. A Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment, ensuring full traceability and 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). This material is hygroscopic (moisture-sensitive) and should be kept in a dry environment to prevent caking or decomposition. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	Off-white to light gray powder or crystals
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%
Solubility	Soluble in alkaline aqueous solutions

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