Description

3-Amino-1,5-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of advanced dyes and pigments. Its disulfonic acid structure provides excellent solubility and reactivity, making it a critical building block for creating vivid and stable colorants. This compound is primarily sought by manufacturers in the dye and pigment, specialty chemical, and research sectors for developing products with specific chromatic and performance properties.

Application

• Dye and Pigment Intermediate: A key precursor for the synthesis of acid dyes, direct dyes, and reactive dyes, particularly for textiles like wool, silk, and nylon.
• Fluorescent Brightener Production: Used in the manufacture of optical brightening agents (OBAs) for paper, detergents, and textiles.
• Chemical Synthesis Building Block: Serves as an important intermediate in organic synthesis for creating more complex sulfonated aromatic compounds.
• Research & Development: Utilized in laboratory settings for developing new chromophores and studying sulfonation chemistry.
• Specialty Chemical Manufacturing: Employed in the production of additives and functional chemicals where sulfonic acid groups are required for solubility or ionic character.

Basic Information

Product Name	3-Amino-1,5-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	14170-43-5
Molecular Formula	C₁₀H₇NNa₂O₆S₂
Molecular Weight	371.26 g/mol
Synonyms	1,5-Naphthalenedisulfonic acid, 3-amino-, disodium salt; 3-Amino-1,5-naphthalenedisulfonic acid sodium salt; Disodium 3-amino-1,5-naphthalenedisulfonate; Aminonaphthalenedisulfonic acid disodium salt; Acid Red 337 (related dye intermediate); 3-Amino-1,5-NDSA disodium salt; 3-A-1,5-NDS Na2
EINECS	238-011-5

Quality Control

Our 3-Amino-1,5-Naphthalenedisulfonic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, impurity profile, and physical characteristics are provided to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light beige powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content	≤ 2.0%
Sulfate Ash	≤ 0.5%
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.