Dow Water & Process Solutions

DOWEX™ MARATHON™ A

A uniform particle size, high capacity, strong base anion exchange resin for demineralization applications.

Product Name	Type	Matrix	Functional Group
DOWEX MARATHON A	Type I Strong Base Anion	Styrene-DVB, Gel	Quaternary Amine

Guaranteed Sales Specification	Units	OH- Form	Cl- Form
Total Exchange Capacity, min.	eq/L	1.0	1.3
Total Exchange Capacity, min.	kgr/ft3 as CaCO3	21.9	28.4
Water Content	%	60 - 72	50 - 60
Uniformity Coefficient		1.1 max.	1.1 max.

Typical Physical and Chemical Properties	Units	OH- Form	Cl- Form
Whole Uncracked Beads	%	95 - 100	95 - 100
Mean Particle Size	μm	610 ± 50	575 ± 50
Total Swelling (Cl- → OH-)	%	20	20
Particle Density	g/mL	1.06	1.08
Shipping Weight**	g/L	640	670
Shipping Weight**	lbs/ft3	40	42

** 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).