strength: 102%, moisture at 105: 1.0%, oil absorption: 23% Fe3O4(%): 96, r esldue: 0.3%, soluble in water IRON OXIDE BLACKFormula:Fe3O4Molecure weight:231.54Chemical-Physcial PropertoesAppearance: S/G(Density):melting point:Solubility: Stability:black crystal powder5.181594Insoluble in water and alcohols, soluble in concentrated strong acids.Stable to heat under 100. Oxidized to red iron oxide at ...