Description

4,8-Disulfo-2,6-Naphthalenedicarboxylic Acid is a multifunctional, high-purity organic intermediate featuring both sulfonic and carboxylic acid groups on a naphthalene backbone. This unique structure makes it a valuable building block for synthesizing advanced materials, particularly high-performance dyes, pigments, and optical brighteners. It is essential for manufacturers in the specialty chemicals sector seeking to develop products with enhanced solubility, chromophoric strength, and thermal stability.

Application

• Synthesis of High-Performance Dyes and Pigments: Serves as a key intermediate for creating acid dyes, reactive dyes, and pigments with excellent color fastness and brightness for textiles and plastics.
• Optical Brightening Agents (OBAs): Used in the production of fluorescent whitening agents for paper, detergents, and textiles to improve perceived whiteness.
• Liquid Crystal Polymers (LCPs): Acts as a monomer or comonomer for producing sulfonated aromatic polymers with tailored properties for advanced engineering plastics.
• Ion-Exchange Resins: A precursor for manufacturing resins with high ion-exchange capacity, used in water purification and chemical separation processes.
• Pharmaceutical Intermediates: Utilized in the research and development of active pharmaceutical ingredients (APIs) requiring a polyfunctional aromatic core.
• Chemical Research & Development: Employed as a versatile building block in organic synthesis and materials science research for novel functional molecules.

Basic Information

Product Name	4,8-Disulfo-2,6-Naphthalenedicarboxylic Acid
CAS No.	742641-46-9
Molecular Formula	C₁₂H₈O₁₀S₂
Molecular Weight	376.32 g/mol
Synonyms	2,6-Naphthalenedicarboxylic acid, 4,8-disulfo-; 4,8-Disulfonaphthalene-2,6-dicarboxylic acid; 2,6-Dicarboxy-4,8-disulfonaphthalene; Naphthalene-2,6-dicarboxylic acid-4,8-disulfonic acid; 4,8-Disulfo-2,6-NDA; DSNDA; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our 4,8-Disulfo-2,6-Naphthalenedicarboxylic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure high purity and consistent performance, meeting the specifications required for advanced synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to support your quality assurance protocols.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which may affect product quality.

Specification

Item	Specification
Appearance	Off-white to light yellow powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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