Iron powder. Water. Activated carbon. Vermiculite. Mineral water absorbent resin. After contact with air to human body harmful?
Water meets air less,Activated carbon is a porous substance, inert in the air, not only harmful to the body, but also the suspension of air, harmful gasesVermiculite, a mineral consisting mainly of silicates, is apparently inert in the normal environment. It is not harmful to people
Iron powder will oxidize when it meets air, but it is harmful to people's health
Salt will see those types.Water absorbent resin will be partially oxidized in the air for a long time, but it will not be harmful to people's health
