• Catalog No. MF-COO-3000
  • Qbeads with carboxyl (-COOH) functional groups on the surface.
  • Conjugation of molecules on Qbeads through the carboxyl (-COOH) group on the beads
  • Fast operation without centrifugation
  • Good magnetism and high hydrophilic

Qbeads-Carboxyl is magnetic bead with surface functional group -COOH. The magnetic bead consists of a single-crystal Fe3O4 sphere core and dextran coating layer. Through chemical modification of dextran, the carboxyl groups (-COOH) are joined to the magnetic beads through a short hydrophilic linker. The hydrophilic surface ensures the magnetic beads excellent dispersion ability and easy handling property in a wide variety of buffers.

Through activation of Qbeads-Carboxyl with EDC, the ligands could be conjugated to the magnetic beads through primary amine groups such as antibody, protein, or peptide.


Iron Oxide (Fe3O4)
Functional group
carboxyl group (-COOH)
Mean Diameter of Particles
~1 μm
Storage Buffer
PBS pH-7.4 with 0.09% Sodium Azide and 0.02% Tween-20
Storage temp.
2 ~ 8 ℃
Ligand density
0.2 mM
Ordering information:
Catalog Number Description Package Size
MF-COO-3000-2ML - 1 mL x 2
MF-COO-3000-5ML 1 mL x 5
MF-COO-3000-10ML - 1 mL x 10