Description

4,6-Disulphoisophthalic Acid is a high-purity, functionalized aromatic dicarboxylic acid derivative, serving as a critical intermediate for advanced material synthesis. Its core value lies in the introduction of two sulfonic acid groups onto the isophthalic acid backbone, which significantly enhances water solubility and provides reactive sites for further chemical modification. This compound is essential for manufacturers in the polymer, specialty chemical, and pharmaceutical industries seeking to develop products with tailored ionic characteristics and improved processability.

Application

• Polymer Modification: Key monomer for synthesizing sulfonated polyesters, polyamides, and polyimides, imparting enhanced hydrophilicity, dyeability, and ion-exchange properties.
• Water-Soluble Resins: Used in the production of high-performance, environmentally friendly coatings, adhesives, and inks that require excellent solubility and stability in aqueous systems.
• Pharmaceutical Intermediates: Serves as a building block for the synthesis of active pharmaceutical ingredients (APIs) and diagnostic agents that benefit from increased solubility and bioavailability.
• Dye and Pigment Manufacturing: Acts as a precursor for creating water-soluble dyes and functional pigments, particularly for textile and paper applications.
• Ion-Exchange Materials: A crucial component in the manufacture of specialty ion-exchange resins and membranes used in water treatment and separation technologies.
• Crosslinking Agent: Utilized in formulations for crosslinking polymers to improve thermal stability, mechanical strength, and chemical resistance.
• Chelating Agents: Intermediate for producing metal-chelating compounds used in industrial cleaning, catalysis, and water softening processes.

Basic Information

Product Name	4,6-Disulphoisophthalic Acid
CAS No.	22411-53-6
Molecular Formula	C8H6O8S2
Molecular Weight	294.26 g/mol
Synonyms	4,6-Disulfoisophthalic Acid; Isophthalic Acid, 4,6-Disulfo-; 4,6-Bis(sulfo)isophthalic Acid; 5-Carboxy-1,3-benzenedisulfonic Acid; 4,6-Disulfonatoisophthalic Acid; DSP Acid; 4,6-Disulpho Isophthalic Acid
EINECS	Contact for details

Quality Control

Our 4,6-Disulphoisophthalic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, sulfonic acid content, and levels of related substances. Our quality commitment supports applications requiring high consistency, including pharmaceutical synthesis and advanced polymer production.

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 under dry, inert conditions to prevent moisture absorption and caking. Recommended long-term storage temperature is 2-8°C. Allow the container to reach room temperature before opening to minimize condensation.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Sulfonic Acid Content (Titration)	Contact for details
Related Substances (HPLC)	Total impurities ≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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