Dow Water & Process Solutions

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).