Description

Dowex Mac-3 Ion Exchange Resin is a macroporous, strongly acidic cation exchange resin supplied in the sodium form, based on a styrene-divinylbenzene copolymer matrix. This robust resin is engineered for demanding industrial applications where high operating capacity, excellent physical stability, and resistance to organic fouling are critical. It is an essential component for water treatment, chemical processing, and hydrometallurgy professionals seeking reliable separation and purification performance.

Application

• Industrial Water Softening & Demineralization: Removal of calcium, magnesium, and other cations to produce softened or high-purity water for boilers, cooling towers, and process streams.
• Chemical & Catalytic Processing: Used as an acid catalyst in organic synthesis reactions such as esterification and alkylation, or for the purification of process chemicals.
• Hydrometallurgy & Metal Recovery: Selective recovery and concentration of valuable metal ions like copper, nickel, and cobalt from leach solutions and waste streams.
• Sugar & Sweetener Processing: Decolorization, demineralization, and purification of sugar syrups, corn sweeteners, and other carbohydrate solutions.
• Condensate Polishing: Final purification of steam condensate in power plants to protect turbines from corrosion and scale.
• Wastewater Treatment: Removal of heavy metals and other cationic contaminants from industrial effluent to meet environmental discharge standards.

Basic Information

Product Name	Dowex Mac-3 Ion Exchange Resin
CAS No.	9052-45-3
Molecular Formula	(C8H7SO3Na)n
Molecular Weight	Contact for details
Synonyms	Macroporous Strong Acid Cation Exchange Resin; Polystyrene sulfonate sodium salt; Sodium polystyrene sulfonate resin; SAC resin; Cation exchanger; Dowex Marathon C; Amberlite IR120; Lewatit S 100; Purolite C100; Gel Strong Acid Cation Resin
EINECS	Contact for details

Quality Control

Our Dowex Mac-3 resin is manufactured and supplied under a strict quality management system. Each batch is tested against rigorous internal specifications to ensure consistent performance in exchange capacity, bead integrity, and chemical stability. While this is an industrial grade product, its quality is suitable for applications requiring reliable and repeatable results. A Certificate of Analysis (COA) detailing key parameters is available for every shipment upon request.

Storage

Preserve in a tightly closed container, protected from light. This product is hygroscopic (moisture-sensitive) and must be stored in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep the original container sealed to prevent moisture uptake and contamination. Do not allow the resin to freeze.

Specification

Item	Specification
Matrix	Styrene-divinylbenzene copolymer
Functional Group	Sulfonic acid (-SO3-)
Ionic Form as Shipped	Sodium (Na+)
Physical Form	Spherical beads
Particle Size Range	Contact for details
Total Exchange Capacity	≥ 1.8 eq/L (min.)
Moisture Holding Capacity	Contact for details
Maximum Operating Temperature	120 °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.