Description

4,8-Diamino-2,6-Naphthalenedisulfonic Acid is a key aromatic disulfonic acid derivative, serving as a versatile intermediate in the synthesis of complex organic molecules. Its primary value lies in its bifunctional structure, providing reactive amino and sulfonic acid groups for coupling and functionalization reactions. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries, where it is used to create high-performance colorants and advanced materials.

Application

• Dye and Pigment Intermediate: A critical building block for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles and leather.
• Fluorescent Brightening Agent (FBA) Production: Used in the manufacture of optical brighteners for paper, detergents, and textiles.
• Pharmaceutical Intermediate: Serves as a precursor in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Employed as a specialized reagent in organic synthesis and material science research.
• Liquid Crystal and Electronic Material Synthesis: A potential monomer for creating advanced polymers and functional materials.
• Complexing Agent: Can act as a ligand or chelating agent in certain metal ion processes.

Basic Information

Product Name	4,8-Diamino-2,6-Naphthalenedisulfonic Acid
CAS No.	6362-06-7
Molecular Formula	C₁₀H₁₀N₂O₆S₂
Molecular Weight	318.32 g/mol
Synonyms	2,6-Naphthalenedisulfonic acid, 4,8-diamino-; 4,8-Diamino-2,6-naphthalenedisulfonic acid; 2,6-Diamino-4,8-naphthalenedisulfonic acid; 1,5-Diamino-3,7-naphthalenedisulfonic acid; 4,8-Diaminonaphthalene-2,6-disulfonic acid; Dinaphthonic acid (obsolete); C.I. 56250; Acid Yellow 76 intermediate
EINECS	228-873-5

Quality Control

Our 4,8-Diamino-2,6-Naphthalenedisulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. We provide comprehensive Certificates of Analysis (COA) with key parameters including assay, impurity profile, and physical characteristics. Our quality commitment ensures the material meets the demanding requirements of industrial synthesis and research applications.

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 product is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect quality and handling properties.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%

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