... superphosphate; normal superphosphate;single superphosphate.2, Standard:ZBG21003-873, Molecular formula:Ca(H20P4)2.H2O 4, Molecular Weight:234. ... 05 5, Density:2.22g/cm+36, Bulk ... 12, Moisture: 3.0 pct max 13, Sulphur:8.2% 14, Free Acid:1.4% 15, Fe2O3:0. ... A12O3:1.18% 17, R2O3:2.2% 18, Fluorine:1.13%19, Cd(Mg/Kg):2.64 20, Pb(Mg/Kg ...