Description

6-Amino-1,3-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble aromatic intermediate essential for the synthesis of advanced colorants and functional materials. Its disulfonic acid sodium salt structure provides excellent solubility and reactivity, making it a critical building block for creating vivid and stable dyes and pigments. This compound is primarily utilized by manufacturers in the dyestuff, textile, and specialty chemical industries seeking to produce high-performance azo dyes, acid dyes, and fluorescent brightening agents.

Application

• Primary Intermediate for Azo Dyes: A key coupling component in the synthesis of acid dyes and direct dyes for textiles, leather, and paper.
• Fluorescent Whitening Agent (FWA) Production: Serves as a core precursor in manufacturing optical brighteners for detergents, plastics, and textiles.
• Specialty Pigment Synthesis: Used in the creation of high-performance pigments for inks, coatings, and plastics requiring specific color fastness and stability.
• Chemical Research & Development: An important reagent in organic synthesis for developing novel sulfonated aromatic compounds and functional materials.
• Analytical Chemistry: Can be employed as a standard or reagent in specific chromatographic or spectroscopic methods.

Basic Information

Item	Detail
Product Name	6-Amino-1,3-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	50976-35-7
Molecular Formula	C₁₀H₇NNa₂O₆S₂
Molecular Weight	371.27 g/mol
Synonyms	6-Amino-1,3-naphthalenedisulfonic acid sodium salt; 1,3-Naphthalenedisulfonic acid, 6-amino-, disodium salt; 6-Amino-1,3-NDSA disodium salt; Acid Yellow 9 intermediate; C.I. 13015; Disodium 6-aminonaphthalene-1,3-disulfonate; 6-Amino-1,3-naphthalene disulfonate disodium
EINECS	Contact for details

Quality Control

Our 6-Amino-1,3-Naphthalenedisulfonic Acid Disodium Salt is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, impurity profile, and identity confirmation. Certificates of Analysis (COA) documenting all test results are provided and available upon request to support your quality assurance and regulatory needs.

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 product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture which may affect quality.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Water Content (Karl Fischer)	≤ 1.5%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	≤ 0.5%

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