Formula: CaHPO4.2H2O CAS Number: 7789-77-7 Standard executed: GB1889-2004( food grade) GB/ T 22549-2008 ( feed grade) Packing and storage: In 25kg, 50kg, 1000kg net bags, store at a cool, dry and well ventilated place. Guaranteed Technical Specifications: Specifications Feed grad Food grade Appearance White powderMain Content 98.0-103.0 98.0-103.0 Total P content min% 17 17 Total Ca min% 20 20 Loss on ignition 24.5-26.5 24.5-26.5 Heavy metals( as Pb) max30ppm10ppm Fluoride max 0.18% 50ppm Arsenic( as As) max 30ppm 2ppm Pb max 5pp Hydrochloric acid insoluble max % 0.05