Limestone Powder 80 Mesh: Chemical & Physical Details Calcium Carbonate (CaCO3): â?¥95% Calcium (Ca): â?¥38.03% Whiteness: â?¥ 93% Magnesium Oxide (MgO): < 0.2 Status: in stock Origin: Vietnam - SHC Group Capacity: 5000 tons/ month Loading Port: Haiphong port Usage: Manufacturing Poultry Feed; Shrimp Feed; Fish Feed Contact: Lucy Tran +84 936 021 698