Description

Dowex HCR-S Ion-Exchange Resin is a high-capacity, strongly acidic cation exchange resin supplied in the sodium form, based on a styrene-divinylbenzene copolymer matrix. This robust resin is engineered for superior performance in demanding industrial demineralization and softening applications, offering excellent chemical stability and physical durability. It is a critical component for industries requiring high-purity water, such as power generation, chemical processing, and microelectronics manufacturing.

Application

• Industrial Water Demineralization: Primary application for producing high-purity deionized (DI) water in power plants, boiler feedwater systems, and chemical production facilities.
• Water Softening: Effective removal of calcium, magnesium, and other scale-forming cations from process water, feedwater, and municipal supplies.
• Condensate Polishing: Used in the final polishing loop of power plant condensate systems to remove trace cationic impurities and maintain ultra-high water purity.
• Chemical Processing & Catalysis: Serves as a catalyst or a purification medium in various organic synthesis and chemical separation processes.
• Sugar & Sweetener Processing: Employed for decolorization, deashing, and purification of sugar syrups, corn sweeteners, and other food-grade products.
• Hydrometallurgy & Metal Recovery: Facilitates the selective recovery and concentration of valuable metals like copper, nickel, and rare earth elements from process streams.
• Pharmaceutical & Fine Chemical Purification: Used in the purification and separation of intermediates and active pharmaceutical ingredients (APIs).
• Ultrapure Water (UPW) for Microelectronics: A key component in mixed-bed or separate-bed systems for producing ultrapure water essential for semiconductor and microchip fabrication.

Basic Information

Product Name	Dowex HCR-S Ion-Exchange Resin
CAS No.	64082-73-1
Molecular Formula	(C8H7SO3Na)n (Polymeric)
Molecular Weight	Polymeric Material
Synonyms	Strongly Acidic Cation Exchange Resin, Sodium Form
Polystyrene Sulfonic Acid Sodium Salt
Sulfonated Polystyrene-DVB Resin
Cation Exchange Resin (Strong Acid, Gel Type)
Dowex 50W-X8 (similar grade)
Amberlite IR-120 (similar grade)
Purolite C-100 (similar grade)
EINECS	Contact for details

Quality Control

Our Dowex HCR-S resin is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance reliability. Each lot is tested against key physical and chemical parameters, including total exchange capacity, moisture holding capacity, bead size distribution, and ionic form. Certificates of Analysis (COA) documenting these specifications are provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperatures (15-25°C). The resin is supplied moist; it must not be allowed to freeze or dry out, as this can cause physical damage to the beads. Keep away from strong oxidizing agents. For long-term storage, ensure containers are sealed to prevent moisture loss or contamination.

Specification

Item	Specification
Ionic Form (as shipped)	Sodium (Na+)
Matrix	Styrene-Divinylbenzene Copolymer (Gel)
Functional Group	Sulfonic Acid (-SO3-)
Total Exchange Capacity (min.)	1.8 eq/L (Na+ form)
Moisture Holding Capacity	45 - 50%
Particle Size Range	0.3 - 1.2 mm (Standard Grade)
Uniformity Coefficient (max.)	1.7
Maximum Operating Temperature	120 °C (Na+ form)
pH Range (Stable)	0 - 14
Shipping Weight (approx.)	850 g/L

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