A uniform particle size, high capacity cation exchange resin for industrial and residential softening and demineralization applications.
Product Name Type Matrix Functional Group
DOWEX MARATHON C Strong Acid Cation Styrene-DVB, Gel Sulfonic Acid


Guaranteed Sales Specification Units Na+ Form H+ Form
Total Exchange Capacity, min. eq/L 2.0 1.8
Total Exchange Capacity, min. kgr/ft3 as CaCO3 43.7 39.3
Water Retention Capacity % 42 - 48 50 - 56
Uniformity Coefficient 1.1 max. 1.1 max.


Typical Physical and Chemical Properties Units Na+ Form H+ Form
Whole Uncracked Beads % 95 - 100 95 - 100
Mean Particle Size μm 585 ± 50 600 ± 50
Total Swelling (Na+ → H+) % 8 8
Particle Density g/mL 1.28 1.20
Shipping Weight** g/L 820 800
Shipping Weight** lbs/ft3 51 50



** As per the backwashed and settled density of the resin, determined by ASTM D-2187.


For additional particle size information, please refer to the Particle Size Distribution Cross Reference Chart (40KB PDF).



®™* Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow