Description

2,3-Naphthalenedisulfonic Acid is a versatile aromatic sulfonic acid derivative, primarily valued as a key intermediate in the synthesis of dyes, pigments, and optical brighteners. Its disulfonic acid groups make it an effective precursor for creating water-soluble compounds and for use in coupling reactions within fine chemical manufacturing. This product is essential for industries focused on colorants, specialty chemicals, and advanced material research, where precise chemical functionality is required.

Application

• Primary intermediate in the synthesis of azo dyes and pigments.
• Key building block for manufacturing optical brighteners and fluorescent whitening agents.
• Used in the production of water-soluble polymers and dispersants.
• Intermediate for specialty surfactants and leveling agents.
• Precursor in pharmaceutical synthesis for creating sulfonated drug molecules.
• Research and development of advanced organic materials and electroplating additives.

Basic Information

Product Name	2,3-Naphthalenedisulfonic Acid
CAS No.	46887-48-3
Molecular Formula	C₁₀H₈O₆S₂
Molecular Weight	288.30 g/mol
Synonyms	2,3-Naphthalenedisulfonic Acid; Naphthalene-2,3-disulfonic Acid; 2,3-NDSA; 2,3-Dihydroxynaphthalene-6,7-disulfonic Acid (related form); 2,3-Naphthalene Disulphonic Acid; NSC 403796; 2,3-NDA; 2,3-Naphthalenedisulphonic Acid
EINECS	Contact for details

Quality Control

Our 2,3-Naphthalenedisulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. Certificates of Analysis (COA) documenting key parameters are provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
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.