Description

Sodium 3,5-Dicarboxybenzenesulfonate is a high-purity, multi-functional aromatic sulfonate salt widely used as a key intermediate and performance additive in advanced chemical synthesis. Its unique structure, featuring both sulfonate and carboxylate groups, provides excellent water solubility and chelating properties, making it valuable for modifying material surfaces and controlling crystallization processes. This compound is essential for manufacturers in the pharmaceutical, specialty chemical, and advanced material sectors seeking reliable, high-quality intermediates for research and production.

Application

• Pharmaceutical Intermediate: Serves as a critical building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for molecules requiring enhanced solubility or specific ionic characteristics.
• Dye & Pigment Manufacturing: Acts as a solubilizing and dispersing agent in the production of water-soluble dyes and high-performance organic pigments.
• Specialty Surfactant: Used in formulating high-end surfactants and detergents where its multi-anionic structure provides superior sequestration of hard water ions.
• Concrete Admixture: Functions as a setting retarder or plasticizer component in advanced concrete formulations to improve workability and final strength.
• Water Treatment Chemical: Employed as a scale inhibitor and dispersant in industrial water treatment systems, effectively controlling carbonate and sulfate scales.
• Electroplating Additive: Used in electroplating baths to improve bath stability, metal distribution, and the quality of the deposited metal finish.
• Polymer Modification: Incorporated into polymer systems, such as polyesters or nylons, to introduce sulfonate groups for improved dyeability or antistatic properties.
• Research & Development: A valuable reagent in chemical R&D for creating novel ionic liquids, metal-organic frameworks (MOFs), and other functional materials.

Basic Information

Product Name	Sodium 3,5-Dicarboxybenzenesulfonate
CAS No.	90021-69-5
Molecular Formula	C8H3Na3O8S
Molecular Weight	336.12 g/mol
Synonyms	5-Sulfoisophthalic Acid Trisodium Salt; Trisodium 5-Sulfoisophthalate; 3,5-Dicarboxybenzenesulfonic Acid Trisodium Salt; Benzenesulfonic acid, 3,5-dicarboxy-, trisodium salt; Trisodium 3,5-dicarboxybenzenesulfonate; SIP Na3; 5-Sulfoisophthalic Acid Sodium Salt
EINECS	Contact for details

Quality Control

Our Sodium 3,5-Dicarboxybenzenesulfonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for critical applications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment to guarantee traceability and compliance with your quality standards.

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 product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking and degradation. Keep away from strong oxidizing agents.

Specification

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

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