Description

1,3-Naphthalenedisulfonic Acid, 5,6-Diamino-, Disodium Salt is a high-purity, water-soluble organic intermediate with a distinctive aromatic disulfonic acid structure. This compound is valued for its dual functional groups, making it a versatile precursor in the synthesis of complex dyes, pigments, and specialty chemicals. It is primarily sought by manufacturers in the fine chemical, dye, and advanced material sectors for research and production.

Application

• Dye and Pigment Intermediate: A key building block for synthesizing high-value azo dyes, acid dyes, and reactive dyes, particularly for textiles and inks.
• Fluorescent Whitening Agent (FWA) Production: Used in the manufacture of optical brighteners for paper, detergents, and plastics.
• Pharmaceutical Synthesis: Serves as a specialized intermediate in the development of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Liquid Crystal and Electronic Material Precursor: Employed in the synthesis of organic components for display technologies and electronic chemicals.
• Complexing Agent: Acts as a ligand or chelating agent in metal treatment processes and analytical chemistry.
• Research & Development: Utilized in academic and industrial R&D for exploring new organic reactions and functional materials.

Basic Information

Product Name	1,3-Naphthalenedisulfonic Acid, 5,6-Diamino-, Disodium Salt
CAS No.	155618-38-5
Molecular Formula	C₁₀H₈N₂Na₂O₆S₂
Molecular Weight	378.28 g/mol
Synonyms	5,6-Diamino-1,3-naphthalenedisulfonic acid disodium salt; 1,3-Naphthalenedisulfonic acid, 5,6-diamino-, sodium salt (1:2); Disodium 5,6-diaminonaphthalene-1,3-disulfonate; 5,6-Diaminonaphthalene-1,3-disulfonic acid disodium salt; C.I. 56295; Acid Yellow 216 (related dye class); Naphthalene-1,3-disulfonic acid derivative
EINECS	Contact for details

Quality Control

Our 1,3-Naphthalenedisulfonic Acid, 5,6-Diamino-, Disodium Salt is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. A Certificate of Analysis (COA) detailing specifications such as assay, impurity profile, and physical characteristics is provided with every shipment to guarantee it meets your specific application 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); keep the container tightly sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Yellow to brownish powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear, complete solution

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