Description

Dowex Marathon C Na(+)-Form Strongly is a high-capacity, strongly acidic cation exchange resin supplied in the sodium form. This product is engineered for superior performance in demanding industrial water treatment and chemical processing applications, offering excellent physical stability and consistent exchange capacity. It is an essential component for professionals in the power generation, pharmaceutical, chemical, and ultrapure water production industries who require reliable demineralization and purification.

Application

• Industrial Water Demineralization: Primary use in mixed-bed and two-bed deionization systems to produce high-purity water for boilers, cooling towers, and process streams.
• Condensate Polishing: Critical for removing cationic impurities from power plant steam condensate to protect turbines and boilers from corrosion and scaling.
• Chemical Processing: Used for catalyst recovery, metal ion separation, and the purification of process chemicals and solvents.
• Pharmaceutical & Biotechnology: Employed in the purification of process water, buffers, and raw materials where consistent ionic purity is mandatory.
• Food & Beverage Production: Applied in water softening and demineralization for ingredient water, ensuring product quality and taste consistency.
• Ultrapure Water (UPW) Systems: A key component in the final polishing stages for semiconductor manufacturing and microelectronics.

Basic Information

Product Name	Dowex Marathon C Na(+)-Form Strongly
CAS No.	150604-77-6
Molecular Formula	(C8H7SO3Na)n
Molecular Weight	Contact for details
Synonyms	Strongly Acidic Cation Exchange Resin (Na+ form); Polystyrene sulfonic acid sodium salt; Sodium polystyrene sulfonate resin; Cation exchanger; SAC resin; Gel-type cation exchange resin; Dowex HCR-S; Amberlite IR-120 Na; Lewatit S 100
EINECS	Contact for details

Quality Control

Our Dowex Marathon C resins are manufactured under strict quality management systems. Each batch is tested to ensure it meets rigorous specifications for exchange capacity, bead integrity, and ionic form. Certificates of Analysis (COA) detailing key performance parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperature (15-25°C). Keep the container sealed to prevent moisture absorption and contamination. Do not allow the resin to freeze.

Specification

Item	Specification
Appearance	Spherical, translucent beads
Ionic Form	Sodium (Na+)
Matrix	Styrene-DVB gel
Functional Group	Sulfonic acid (-SO3-)
Total Exchange Capacity (min.)	≥ 1.8 eq/L
Moisture Holding Capacity	50 - 60%
Particle Size Range	300 - 1200 µm
Uniformity Coefficient (max.)	1.7

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