... of crystal distribution, small particles, high tap density and higher purity. Physical and Chemical Properties: ... FormulaFePO4*2H2Omolecular weight (Anhydrous)150.82Physical PropertiesWhite crystals, insoluble in waterIron, %29.65Phosphorus, %15.37Fe3+, %29.93Sulfate ... /kg407Lead, mg/kg0.203Arsenic, mg/kg1.243Tap density (g/cm3)0.85Particle Size DistributionD100.840D501.678D902.823Specific Surface, ...