Description

3-Aminonaphthalene-1,5-Disulphonic Acid, Sodium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of specialized dyes and pigments. Its value lies in its dual sulphonic acid groups and amino functionality, which enable the creation of vivid, colorfast azo dyes and complexing agents. This compound is a critical raw material for manufacturers in the dyestuff, textile, and specialty chemical industries seeking to produce high-performance colorants and functional additives.

Application

• Primary Intermediate for Azo Dyes: Serves as a key diazo component or coupling agent in the production of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the synthesis of high-grade organic pigments, including those for inks, coatings, and plastics, where color stability is paramount.
• Fluorescent Brightening Agents (FBAs): Acts as a precursor in the manufacture of optical brighteners and whitening agents for detergents and papers.
• Chemical Synthesis: Employed as a building block for more complex sulfonated aromatic compounds used in specialty chemicals and pharmaceutical intermediates.
• Research & Development: Utilized in academic and industrial R&D labs for developing novel chromophores and functional materials.

Basic Information

Product Name	3-Aminonaphthalene-1,5-Disulphonic Acid, Sodium Salt
CAS No.	52085-24-2
Molecular Formula	C10H7NNa2O6S2
Molecular Weight	363.27 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 3-amino-, disodium salt; 3-Amino-1,5-naphthalenedisulfonic acid disodium salt; Aminonaphthalenedisulfonic acid sodium salt; Acid Red 249 intermediate; Azoic diazo component 38; Naphthylamine disulfonic acid sodium salt; 1-Naphthylamine-3,7-disulfonic acid sodium salt (related isomer); Disodium 3-aminonaphthalene-1,5-disulfonate
EINECS	Contact for details

Quality Control

Our 3-Aminonaphthalene-1,5-Disulphonic Acid, Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for dye and pigment synthesis. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with each shipment to guarantee consistency and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the original container must be kept sealed to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Off-white to light brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in Water)	Clear solution

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