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Highly crosslinked polystyrene-divinylbenzene matrix for exceptional physical and chemical stability.
Sulfonic acid functional groups providing strong acidity and complete ionization across the full pH range.
Optimized bead uniformity and mechanical strength to minimize pressure drop and resist attrition in high-flow service.
Consistent regeneration efficiency with standard regenerants (e.g., NaCl, HCl), enabling reliable long-term performance.
Low soluble organics release (SOR) meeting stringent requirements for ultrapure water and pharmaceutical applications.
Primary cation removal in industrial demineralization systems for boiler feedwater pretreatment.
Softening of municipal and process water in food & beverage, dairy, and textile industries.
Condensate polishing in power generation plants requiring high-purity steam cycles.
Pre-treatment for reverse osmosis (RO) and electrodeionization (EDI) systems to protect downstream membranes.
Catalytic support and metal recovery applications where robust acid functionality is required.
| Chemical Type | Strong acid cation (sulfonic acid) |
| Product Form | Moist, spherical beads |
| Appearance | Amber, translucent beads |
| Functional Group | –SO₃H |
| Matrix Structure | Crosslinked polystyrene-divinylbenzene |
| Ion Form | Na⁺ (standard shipping form) |
| Moisture Content | 45–50% (as shipped) |
| Uniformity Coefficient | ≤1.4 |
Q1: What is the primary functional group and matrix structure of DOW MARATHON C resin?
A: DOW MARATHON C is a gel-type, strongly acidic cation exchange resin based on a crosslinked polystyrene-divinylbenzene (PS-DVB) matrix, with sulfonic acid (–SO3H) groups as the active ion-exchange sites.
Q2: Is DOW MARATHON C suitable for dealkalization or softening in high-flow industrial water treatment systems?
A: Yes — it is widely employed for base metal removal, hardness softening, and dealkalization in municipal and industrial water service applications, particularly where high capacity, good kinetics, and consistent regeneration performance are required.
Q3: How does temperature affect the operational performance and physical stability of this resin?
A: DOW MARATHON C is designed for continuous service up to 120 °C (248 °F), though long-term exposure above 100 °C may gradually reduce capacity and mechanical integrity; optimal performance is typically achieved between 10 °C and 50 °C.
Q4: Can this resin be used in food-grade or pharmaceutical water purification systems?
A: DOW MARATHON C is manufactured and tested to meet applicable requirements for use in potable water applications; however, final regulatory compliance depends on system design, validation protocols, and local authority approval — users must confirm suitability for specific food or pharma applications through appropriate qualification.
Q5: What regeneration chemicals are recommended, and how does regenerant choice impact efficiency?
A: Sodium chloride (NaCl) is most commonly used for softening service; sulfuric acid (H2SO4) or hydrochloric acid (HCl) may be applied for full cation removal or hydrogen-form operation. Regeneration efficiency depends on concentration, flow rate, contact time, and feed water quality — higher purity regenerants generally support more complete recovery of exchange capacity.
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E-mail: wangxingqiang@ericwchem.com
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