Description

5,6-Diaminonaphthalene-1-Sulphonic Acid is a high-purity aromatic amine sulfonic acid derivative, serving as a critical intermediate in advanced organic synthesis. Its bifunctional diamine and sulfonic acid groups make it a versatile building block for creating complex molecules with specific optical and electronic properties. This compound is essential for manufacturers in the dye, pigment, and specialty chemical industries seeking to develop high-performance products.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of high-value, complex azo dyes and pigments, particularly those requiring naphthalene-based structures for enhanced color fastness and brilliance.
• Fluorescent Whitening Agent (FWA) Production: Used in the manufacture of optical brighteners for paper, textiles, and detergents, where its structure contributes to UV absorption and blue light emission.
• Pharmaceutical Intermediate: Serves as a building block in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents that incorporate naphthalene scaffolds.
• Polymer and Resin Modifier: Incorporated into specialty polymers to introduce sulfonic acid groups, which can improve solubility, dyeability, or ionic characteristics.
• Analytical Reagent and Chelating Agent: Utilized in analytical chemistry for metal ion detection and complexation due to its amine functional groups.
• Research & Development: A valuable compound for academic and industrial R&D in organic chemistry, materials science, and photochemistry.

Basic Information

Item	Detail
Product Name	5,6-Diaminonaphthalene-1-Sulphonic Acid
CAS No.	84-92-4
Molecular Formula	C10H10N2O3S
Molecular Weight	238.26 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 6-amino-; 6-Amino-1,5-naphthalenedisulfonic acid; 5,6-Diamino-1-naphthalenesulfonic acid; 1-Naphthalenesulfonic acid, 5,6-diamino-; 5,6-Diaminonaphthalene-1-sulfonic acid; 1,5-NDSA 6-amine; DANSA
EINECS	201-581-6

Quality Control

Every batch of our 5,6-Diaminonaphthalene-1-Sulphonic Acid is produced and tested under a strict quality management system. We employ advanced analytical techniques including HPLC, IR, and titration to ensure identity, purity, and consistency meet exacting standards. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee full traceability and compliance with your specifications.

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 and easily oxidized nature, it is recommended to store the material under an inert atmosphere (e.g., nitrogen or argon) for long-term preservation and to minimize moisture uptake.

Specification

Item	Specification
Appearance	Light brown to gray powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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