Description

2,3,5-Naphthalenetrisulfonic Acid is a specialized organic sulfonic acid derivative characterized by its high degree of sulfonation on the naphthalene ring. This compound matters as a versatile intermediate and functional additive, valued for its ability to impart solubility, acidity, and chelating properties in complex formulations. It is primarily needed by manufacturers in the dye and pigment, pharmaceutical, and specialty chemical synthesis industries, where it serves as a key building block or processing aid.

Application

• Intermediate in the synthesis of acid dyes, reactive dyes, and optical brighteners.
• Building block for pharmaceutical active ingredients and fine chemicals.
• Dispersing agent and leveling agent in textile and leather processing.
• Catalyst or co-catalyst in organic synthesis and polymerization reactions.
• Additive in electroplating baths and metal surface treatment formulations.
• Research and development of new functional materials and chelating agents.

Basic Information

Product Name	2,3,5-Naphthalenetrisulfonic Acid
CAS No.	47209-86-9
Molecular Formula	C₁₀H₈O₉S₃
Molecular Weight	400.36 g/mol
Synonyms	Naphthalene-2,3,5-trisulfonic Acid; 2,3,5-Trisulfonaphthalene; Trisodium 2,3,5-Naphthalenetrisulfonate (salt form); NTSA; Naphthalenetrisulfonic Acid; 2,3,5-NTSA
EINECS	Contact for details

Quality Control

Our 2,3,5-Naphthalenetrisulfonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is 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. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed and protected from humidity. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	White to off-white powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Sulfate 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.