Description

Naphthalene-2,6-Disulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in fine chemical synthesis. Its value lies in its dual sulfonic acid groups, which provide strong acidity and excellent water solubility, making it a crucial building block for dyes, optical brighteners, and other functional materials. This compound is essential for manufacturers in the dye and pigment, agrochemical, and specialty chemical industries seeking to produce high-performance sulfonated products.

Application

• Dye and Pigment Intermediate: A critical precursor for the synthesis of acid dyes, reactive dyes, and optical brighteners (fluorescent whitening agents).
• Agrochemical Synthesis: Used in the manufacture of certain herbicides and plant growth regulators that require a sulfonated aromatic backbone.
• Chemical Research & Development: Serves as a model compound and starting material in organic synthesis for creating novel sulfonated polymers and surfactants.
• Catalyst and Additive Precursor: Can be utilized to produce metal-complex catalysts or functional additives for various industrial processes.
• Pharmaceutical Intermediate: Potential use in the synthesis of specific active pharmaceutical ingredients (APIs) requiring disulfonated naphthalene structures.

Basic Information

Product Name	Naphthalene-2,6-Disulfonic Acid
CAS No.	581-75-9
Molecular Formula	C₁₀H₈O₆S₂
Molecular Weight	288.30 g/mol
Synonyms	2,6-Naphthalenedisulfonic Acid; Naphthalene-2,6-disulphonic Acid; 2,6-NDSA; 6-Amino-2-naphthalenesulfonic Acid (related); 2,6-Dihydroxynaphthalene (related); Dinaphthol disulfonate (related); EINECS 209-472-5
EINECS	209-472-5

Quality Control

Our Naphthalene-2,6-Disulfonic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay by titration, identification by FT-IR, and control of key impurities by HPLC, to ensure it meets exacting specifications. A Certificate of Analysis (COA) detailing purity, physical properties, and test results is provided with every shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Due to its nature as a strong acid/organic solvent, the container should be kept tightly sealed to prevent moisture absorption and contamination. Recommended long-term storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Related Substances (HPLC)	Total impurities ≤ 5.0%
Sulfate Ash	≤ 0.5%

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