Description

Dowex 50X2 is a strongly acidic cation exchange resin supplied in the sodium form, widely recognized for its high capacity and chemical stability. This product is essential for processes requiring the selective removal or exchange of cations from aqueous and some organic solutions. It is a critical component for industries focused on water treatment, chemical purification, and catalysis. The reliable performance of this resin makes it a preferred choice for demanding industrial separation and purification applications.

Application

• Water Demineralization & Softening: Used in mixed-bed or two-bed deionization systems to produce high-purity water for power generation, pharmaceuticals, and electronics manufacturing.
• Chemical Purification: Employed to remove cationic impurities and metal ions from process streams, acids, and solvents in fine chemical and pharmaceutical synthesis.
• Catalysis: Serves as a solid acid catalyst in various organic synthesis reactions, including esterification and hydrolysis, offering advantages of easy separation and reusability.
• Sugar & Sweetener Processing: Utilized for decolorization and demineralization of sugar syrups, high-fructose corn syrup, and other sweetener solutions.
• Hydrometallurgy: Applied in the recovery and separation of valuable metals like copper, nickel, and rare earth elements from leach solutions.
• Laboratory Scale Separations: A standard resin for chromatographic separation of amino acids, peptides, and other biomolecules in research and analytical laboratories.

Basic Information

Product Name	Dowex 50X2
CAS No.	81133-25-7
Molecular Formula	(C8H7SO3Na)n
Molecular Weight	Contact for details
Synonyms	Dowex 50W-X2; Sodium polystyrene sulfonate; Polystyrene sulfonic acid sodium salt; Cation exchange resin 50X2; Strongly acidic cation exchanger; Na-form cation resin; Amberlite-type resin (analog); Sulfonated polystyrene resin
EINECS	Contact for details

Quality Control

Our Dowex 50X2 resin is manufactured under a stringent quality management system. Each batch is tested to ensure it meets critical parameters such as exchange capacity, moisture content, particle size distribution, and ionic form. While this is an industrial grade product, our quality protocols ensure consistent performance and reliability for your processes. Certificates of Analysis (COA) with detailed test results are available upon request.

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). The resin is stable in strong acid/organic solvent environments but should be kept in its original packaging to prevent contamination and moisture uptake. Do not allow the product to freeze.

Specification

Item	Specification
Appearance	Yellowish to brown opaque beads
Ionic Form	Sodium (Na+)
Matrix	Polystyrene crosslinked with divinylbenzene
Functional Group	Sulfonic acid (-SO3-)
Total Exchange Capacity	≥ 1.7 meq/mL (H+ form)
Moisture Holding Capacity	Contact for details
Particle Size Range	Contact for details
Uniformity Coefficient	≤ 1.7
Maximum Operating Temperature	150°C (Na+ form)
pH Range	0-14

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