Ferrofluids are colloidal liquids made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water), with each tiny particle thoroughly coated with a surfactant to inhibit clumping. Ferrofluids usually do not retain magnetization in the absence of an externally applied field and thus are often classified as "superparamagnets" rather than ferromagnets.
As an official distributor of Ferrotec ferrofluids, we can provide a wide range of fluids in various forms and volumes.