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Cospheric offers black paramagnetic microspheres in dry powder form, which has enabled scientists to leverage the benefits of paramagnetic particles in new applications. These highly spherical polyethylene microspheres offer the flowability and visibility of larger microspheres, with the ability to be separated from other materials for reuse and cleanup.
Paramagnetic microspheres have the ability to increase their magnetization with an applied magnetic field and decrease their magnetism when the field is removed. No residual magnetization is observed which provides practical advantages for end uses, including ease of separation and suitability for automation. When the magnetic field is removed, the microspheres demagnetize and redisperse easily.
No solvents are used in the manufacturing process. The micropsheres are highly opaque particles with maximum hiding power.
Other colors, sizes and grades of polyethylene spherical particles are available: Polyethylene Microspheres (Colors, Fluorescent, Phosphorescent, Barium Sulfate)
Properties:
Density: 1.1-1.3g/cc
Microspheres vs Microparticles:
Microspheres: >90% of particles are spheresMicroparticles: >90% of particles are irregular shapes
Polyethylene microspheres and microparticles are hydrophobic and suspend easily in oil-based solutions. They can also be suspended in aqueous solution if coated with a surfactant prior to suspending in water. We recommend using Tween 80 or Tween 20 Surfactants.
Material Safety Data Sheet - Polyethylene Spheres, Beads, Microspheres, and Nanospheres
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Cellulose Acetate Polymer Spheres - Large Plastic Beads ~1.3g/cc - 1mm to 12mm - All Colors
Price: $67.36-$250.19
Clear Polyethylene Microspheres 0.96g/cc - 1um to 1700um (1.7mm)
Price: $133.37-$5,168.86
White Polyethylene Microspheres - 10um to 1200um (1.2mm) - 1.00-1.45g/cc
Price: $133.37-$478.24
Tween Biocompatible Surfactants - 2ml
Price: $22.45