... , crystalline powderDensity : 2.484 g/cm3Melting point : 550 ° CBoiling point: 1500 ° CSolubility (water) : SolubleSolubility (organic solvents) : InsolubleUse:Mainly used in ... %≥ 68.0 68.0 2Inactive phosphate,as P 2 O 5 %≤ 7.5 7.5 3 Iron, as Fe, %≤ 0.05 0.05 4 ... Solubility Qualified Qualified 6 Heavy metal, as Pb, %≤ - 0.001 7 Arsenic, as As, %≤ - 0.0003 8 Fluoride, as F, %≤ - 0.003 9 Water insoluble ...