Description

1,3-Naphthalenedisulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of dyes, pigments, and optical brighteners. Its disulfonic acid functionality provides excellent water solubility and reactivity, making it a critical building block for creating complex, high-value chemical products. This compound is essential for manufacturers in the dye, textile, and specialty chemical industries seeking to develop vibrant colors and advanced functional materials.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Optical Brightener (OBA) Production: Used in the manufacture of stilbene-based optical brightening agents for detergents, papers, and plastics.
• Chemical Synthesis Building Block: Acts as a starting material or intermediate for pharmaceuticals, agrochemicals, and other fine chemicals due to its reactive sulfonic acid groups.
• Surfactant and Dispersant Formulation: Can be utilized to produce sulfonated surfactants and dispersing agents for various industrial applications.
• Research & Development: Employed in academic and industrial R&D for developing new polymeric materials and specialty organic compounds.

Basic Information

Product Name	1,3-Naphthalenedisulfonic Acid
CAS No.	6094-26-4
Molecular Formula	C₁₀H₈O₆S₂
Molecular Weight	288.30 g/mol
Synonyms	Naphthalene-1,3-disulfonic Acid; 1,3-NDSA; 1,3-Naphthalenedisulphonic Acid; Naphthalene-1,3-disulphonic Acid; 1,3-Dihydroxynaphthalene-6,8-disulfonic Acid (tautomer); 4,6-Dihydroxynaphthalene-2,8-disulfonic Acid (tautomer); NSC 40326
EINECS	228-047-4

Quality Control

Our 1,3-Naphthalenedisulfonic Acid is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including assay (HPLC/Titration), identification (IR), and impurity profile analysis, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) documenting purity, physical properties, and test results is provided with every shipment to guarantee traceability and consistent quality.

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) and a strong acid; ensure the container is kept sealed to prevent absorption of atmospheric moisture and store away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC/Titration)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Sulfated Ash	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 3.0%

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