Dow Water & Process Solutions

DOWEX™ MAC-3

A macroporous weak acid cation exchange resin used for water softening, dealkalization, and demineralization applications.

Product Name	Type	Matrix	Functional Group
DOWEX MAC-3	Weak Acid Cation	Polyacrylic, Macroporous	Carboxylic Acid

Guaranteed Sales Specification	Units	H+ Form
Total Exchange Capacity, min.	eq/L	3.8
Total Exchange Capacity, min.	kgr/ft3 as CaCO3	83.0
Particle Size Distribution
300 μm - 1200 μm, min. (50 mesh - 16 mesh)	%	90

Typical Physical and Chemical Properties	Units	H+ Form
Water Retention Capacity	%	44 - 50
Whole Beads	%	95 - 100
Total Swelling (H+ → Na+)	%	~70
Particle Density	g/mL	1.18
Shipping Weight**	g/L	750
Shipping Weight**	lbs/ft3	47

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