Description

2,6-Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble organic salt widely utilized as a key intermediate in specialty chemical synthesis. Its disulfonic acid structure makes it a valuable building block for creating dyes, optical brighteners, and advanced polymeric materials. This compound is essential for manufacturers and R&D laboratories in the dye, textile, and fine chemical industries seeking reliable, high-quality intermediates for their production processes.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of naphthalene-based acid dyes, reactive dyes, and optical brighteners (fluorescent whitening agents).
• Polymer and Resin Modification: Used to introduce sulfonate groups into polymers to enhance water solubility, dyeability, or ionic character.
• Electroplating and Surface Treatment: Acts as an additive or brightener in electroplating baths to improve coating quality and uniformity.
• Chemical Synthesis: Serves as a versatile building block for pharmaceutical intermediates and other specialty organic compounds.
• Analytical Reagent: Employed in research and analytical chemistry as a standard or reagent due to its defined structure and properties.
• Concrete Admixture: Can be used in the formulation of superplasticizers and water-reducing agents for high-performance concrete.

Basic Information

Product Name	2,6-Naphthalenedisulfonic Acid Disodium Salt
CAS No.	1655-45-4
Molecular Formula	C10H6Na2O6S2
Molecular Weight	332.24 g/mol
Synonyms	Disodium 2,6-naphthalenedisulfonate; 2,6-Naphthalenedisulfonic acid, disodium salt; Naphthalene-2,6-disulfonic acid disodium salt; 2,6-NDS disodium salt; Dinatriumnaphthalin-2,6-disulfonat; NSC 403124; 2,6-NDSA-Na2
EINECS	Contact for details

Quality Control

Our 2,6-Naphthalenedisulfonic Acid Disodium Salt is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and consistency. Certificates of Analysis (COA) documenting key parameters are available for 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). This product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking and degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
pH (5% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

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