Description

5,6-Diaminonaphthalene-1,3-Disulphonic Acid is a high-purity, functionalized naphthalene derivative of significant industrial importance. This compound serves as a critical key intermediate in the synthesis of complex dyes, pigments, and optical brighteners. It is primarily required by manufacturers in the specialty chemicals, textile, and advanced materials sectors seeking to produce high-performance colorants and functional molecules.

Application

• Primary Intermediate for Dyes & Pigments: A crucial building block in the synthesis of high-value azo and polycyclic dyes, particularly for textiles, inks, and plastics.
• Optical Brightening Agents (OBAs): Used in the manufacture of fluorescent whitening agents for paper, detergents, and textiles.
• Functional Polymer Synthesis: Acts as a monomer or cross-linking agent for creating polymers with specific optical or electronic properties.
• Liquid Crystal & Electronic Materials: Serves as a precursor for advanced materials used in displays and organic electronics due to its conjugated structure and functional groups.
• Analytical Chemistry & Research: Employed as a reagent or standard in chemical research and analytical method development.
• Corrosion Inhibitor Formulations: Used in specialized industrial formulations for metal surface treatment and protection.

Basic Information

Product Name	5,6-Diaminonaphthalene-1,3-Disulphonic Acid
CAS No.	73692-57-6
Molecular Formula	C₁₀H₁₀N₂O₆S₂
Molecular Weight	318.33 g/mol
Synonyms	1,3-Naphthalenedisulfonic acid, 5,6-diamino-; 5,6-Diamino-1,3-naphthalenedisulfonic acid; 5,6-Diaminonaphthalene-1,3-disulfonic acid; 1,3-Naphthalenedisulfonic acid, 5,6-diamino- (9CI); 5,6-Diaminonaphthalene-1,3-disulphonate; DANSA; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our 5,6-Diaminonaphthalene-1,3-Disulphonic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided and available upon request.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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