Ferroferric oxide - 722,730

Physical and Chemical property: density:5.18g/cm^3,melting point:1867.5K(1594.5℃),magnetism, water-fast, acid soluble, good electroconductivity
Appearance:black crystalloid

Usage:(1) raw materials of tapes and telecommunications' equipment,
(2) making primers and paint,
(3) abrasive and pigment and polishes,
(4) to prevent or slow down steel corrosion