Description

Naphthalenedisulfonic Acid Disodium Salt is a high-purity, water-soluble organic salt derived from naphthalene disulfonic acid. This compound serves as a versatile intermediate and functional additive, valued for its excellent solubility and ionic properties in aqueous systems. It is essential for manufacturers in the dye, surfactant, and polymer industries seeking reliable performance in synthesis and formulation processes.

Application

• Dye and Pigment Intermediate: A key building block in the synthesis of acid dyes, reactive dyes, and optical brighteners.
• Surfactant and Detergent Formulation: Used as a hydrotrope and solubilizing agent to enhance the clarity and stability of liquid detergent concentrates.
• Polymer and Resin Production: Acts as a monomer or functional additive in the manufacture of specialty polymers, including polyelectrolytes and ion-exchange resins.
• Concrete Admixture: Functions as a plasticizer or dispersing agent in cement and concrete formulations to improve workability and reduce water content.
• Electroplating and Metal Treatment: Employed in electroplating baths and surface treatment solutions for its buffering and complexing properties.
• Pharmaceutical and Agrochemical Synthesis: Serves as a sulfonation agent or anionic component in the synthesis of certain active pharmaceutical ingredients (APIs) and agrochemicals.

Basic Information

Product Name	Naphthalenedisulfonic Acid Disodium Salt
CAS No.	36511-65-6
Molecular Formula	C₁₀H₆Na₂O₆S₂
Molecular Weight	332.24 g/mol
Synonyms	Disodium Naphthalene-1,5-disulfonate; 1,5-Naphthalenedisulfonic Acid Disodium Salt; Naphthalene-1,5-disulfonic Acid Disodium Salt; NDSA Disodium Salt; Dinatriumnaphthalin-1,5-disulfonat; Disodium 1,5-Naphthalenedisulphonate; Naphthalenedisulfonate Sodium Salt; Acid Disodium Salt of Naphthalenedisulfonic Acid
EINECS	Contact for details

Quality Control

Our Naphthalenedisulfonic Acid Disodium Salt is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting key parameters such as assay, moisture content, and heavy metals are available upon request 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 material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
pH (5% Solution)	7.0 - 9.0
Heavy Metals (as Pb)	≤ 20 ppm
Sulfate (as SO₄)	≤ 0.5%

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