Description

7-Amino-1,3-Naphthalenedisulfonic Acid is a key aromatic sulfonic acid derivative and a vital organic intermediate in fine chemical synthesis. Its primary value lies in its bifunctional structure, featuring both an amino group and two sulfonic acid groups, which makes it an essential precursor for manufacturing high-value dyes and pigments. This compound is critically needed by manufacturers in the dyestuff, textile, and specialty chemical industries for producing acid dyes, reactive dyes, and fluorescent whitening agents.

Application

• Primary Intermediate for Dyes & Pigments: A crucial building block for the synthesis of acid dyes, direct dyes, and reactive dyes used in textile coloring.
• Fluorescent Brightener Production: Serves as a key starting material in the manufacture of optical brightening agents (OBAs) for paper, detergents, and textiles.
• Specialty Chemical Synthesis: Used in organic synthesis to create more complex sulfonated aromatic compounds for various industrial applications.
• Research & Development: Employed in chemical R&D labs for developing new chromophores and functional materials.

Basic Information

Product Name	7-Amino-1,3-Naphthalenedisulfonic Acid
CAS No.	86-65-7
Molecular Formula	C₁₀H₉NO₆S₂
Molecular Weight	303.31 g/mol
Synonyms	1,3-Naphthalenedisulfonic acid, 7-amino-; 7-Amino-1,3-naphthalenedisulfonic acid; 2-Aminonaphthalene-4,8-disulfonic acid; 8-Amino-1,3-naphthalenedisulfonic acid; 7-Aminonaphthalene-1,3-disulfonic acid; Aminonaphthalenedisulfonic acid; Kyselina 7-amino-1,3-naftalendisulfonova [Czech]; 1,3-ANDSA; 7-ANDSA
EINECS	201-690-6

Quality Control

Our 7-Amino-1,3-Naphthalenedisulfonic Acid is produced under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee batch-to-batch consistency and support your quality assurance protocols.

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 incompatible materials.

Specification

Item	Specification
Appearance	Off-white to grayish powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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