BioMag® Maxi superparamagnetic particles are 3-12µm irregularly shaped iron oxide particles. This size distinguishes BioMag® Maxi from our well known conventional BioMag® particles that are approximately 1.6µm and our BioMag®Plus particles that are approximately 1µm. It has been shown that larger, denser particles are more efficient in immunomagnetic capture assays, especially in viscous solutions.