Description

Naphthalenedisulfonic Acid CAS NO 25167-78-6 is a versatile aromatic sulfonic acid derivative, primarily valued for its strong acidity and solubility in organic media. This compound serves as a critical intermediate and functional additive in advanced chemical synthesis and industrial processes. It is essential for manufacturers in the dye, polymer, and specialty chemical sectors seeking reliable, high-purity raw materials.

Application

• Dye and Pigment Intermediate: A key building block for synthesizing acid dyes, reactive dyes, and optical brighteners.
• Polymer Industry: Used as a catalyst, curing agent, or monomer in the production of specialty resins, polyelectrolytes, and ion-exchange materials.
• Electroplating & Metal Treatment: Functions as a brightening agent, complexing agent, or additive in electroplating baths and surface treatment formulations.
• Pharmaceutical Synthesis: Acts as a sulfonating agent or an intermediate in the synthesis of certain active pharmaceutical ingredients (APIs).
• Surfactant & Detergent Formulation: Employed in the manufacture of specialized surfactants and detergent additives.
• Chemical Research & Development: Serves as a reagent for organic synthesis and material science research.

Basic Information

Item	Details
Product Name	Naphthalenedisulfonic Acid
CAS No.	25167-78-6
Molecular Formula	C₁₀H₈O₆S₂
Molecular Weight	288.30 g/mol
Synonyms	Naphthalene-1,5-disulfonic Acid; Dinaphthalenesulfonic Acid; 1,5-NDSA; 1,5-Naphthalenedisulfonic Acid; Dinaphthylsulfonic Acid; Naphthalenedisulphonic Acid; Acid Naphthalenedisulfonic; Naphthalene Disulfonate
EINECS	Contact for details

Quality Control

Our Naphthalenedisulfonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay, impurity profiling, and physical characterization, to ensure it meets exacting standards for industrial and fine chemical applications. Certificates of Analysis (COA) documenting purity and specifications are provided with every shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Due to its strong acid nature, ensure containers are made of compatible materials and are clearly labeled. Recommended storage temperature: 15-25°C.

Specification

Item	Specification
Appearance	Off-white to light brown powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfated Ash	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm

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