Carboxymethyl, weak cation exchange functionality chemically bonded to spherical silica. Unique polymeric bonding chemistry produces low pKa, allowing efficient retention of Zr, Y, Lu, Ac from pH 3-7 and Ga, Sc, Ra from pH 4-7.

The CM silica is an efficient metal ion scavenger from dilute acid or buffer solutions that can be used to concentrate and purify metal ions and scavenge free metal ions from radiolabeled small molecules and other targeting agents.


substrate:                 Spherical silica

particle size:            20-45 µm

porosity:                  300Å

pore volume:            0.7-0.9 mL /g

pH stability:             2-10