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.




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