Ferrofluid is not toxic or dangerous. However, young children should not be left to play with it. Ferrofluid should not be experimented with around expensive items in the home. Ensure that you wear old clothing when working with ferrofluid as new clothing may get ruined. This is because ferrofluid is difficult to wash off and may cause permanent stains to clothing or other types of materials. Ensure that you wear gloves plus eye protection like goggles. Use only disposal dishes in case they get damaged or broken.