http://www.cd-bioparticles.com/p/Absolute-Mag-BSA-Magnetic-Particles-130-nm_20_194_316_5030.htmlAbsolute Mag BSA Magnetic Particles, 130 nm are dextran iron oxide composite particles provided with covalently bound bovine serum albumin (BSA), which makes these particles more hydrophilic and biocompatible. At the same time, similar particles with HAS on the surface are achievable if requested. These protein-coated particles can be easily separated with permanent magnets. The supplying system is PBS buffer (pH=7.4) with 0.02 % sodium azide.