Description

5-Sulfoisophthalic Acid 5-Potassium Salt is a high-purity, water-soluble aromatic sulfonate salt widely used as a key functional monomer. This compound is valued for its ability to introduce permanent anionic charges and enhance hydrophilicity in polymer chains, significantly improving performance characteristics. It is essential for manufacturers in the polymer, textile, and specialty chemical industries seeking to develop advanced materials with superior dyeability, antistatic properties, and water compatibility.

Application

• Polymer Modification: A critical monomer for producing sulfonated polyesters, polyamides (nylons), and other condensation polymers to impart permanent ionic character and improve dye uptake.
• Specialty Coatings & Inks: Used in water-based and solvent-based coating formulations to enhance dispersion stability, adhesion, and substrate wetting properties.
• Textile Auxiliaries: Incorporated into fiber spin finishes and fabric treatment chemicals to provide excellent antistatic and soil-release effects.
• Ion-Exchange Resins: Serves as a functional precursor in the synthesis of cation-exchange resins with high capacity and stability.
• Dispersants & Surfactants: Acts as an intermediate for manufacturing high-performance dispersing agents and surfactants for pigments and ceramics.
• Photographic Chemicals: Utilized in the production of certain light-sensitive materials and photographic emulsions.
• Adhesives & Sealants: Enhances the water compatibility and bonding performance of adhesive formulations.
• Research & Development: A valuable building block in organic synthesis and material science research for creating novel functionalized polymers.

Basic Information

Product Name	5-Sulfoisophthalic Acid 5-Potassium Salt
CAS No.	46728-71-6
Molecular Formula	C8H5KO7S
Molecular Weight	284.28 g/mol
Synonyms	Potassium 5-Sulfoisophthalate; 5-Sulfoisophthalic Acid Monopotassium Salt; 5-Sulfobenzene-1,3-dicarboxylic Acid Potassium Salt; SIP (Potassium Salt); Monopotassium 5-Sulfoisophthalate; 3-Carboxy-4-sulfobenzoic Acid Potassium Salt; 1,3-Benzenedicarboxylic Acid, 5-Sulfo-, Monopotassium Salt
EINECS	Contact for details

Quality Control

Our 5-Sulfoisophthalic Acid 5-Potassium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. We provide comprehensive Certificates of Analysis (COA) detailing key specifications such as assay, impurity profile, and moisture content. Our quality commitment ensures the material meets the stringent requirements for polymer synthesis and other high-value industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed in a dry environment to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
pH (5% aqueous solution)	6.0 - 8.0
Sulfate (as SO4)	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

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