... : CaHPO4.2H2O(2) Molecular weight of 172.08(4) Standard: HG 2636-2000(5) It is easily soluble in weak acid ... 1 2. Powder Form3. P18% min, Ca 24 % min, F0.18 % max4. As 0.003% max, Pb 0.003 % max5. Fineness ... -2 2. Granular Form3. P18% min, Ca 24 % min, F0.18 % max4. As 0.003% max, Pb 0.003 % max5. Fineness ... -3 2. Granular Form3. P18% min, Ca 24 % min, F0.18 % max4. As 0.003% max, Pb 0.003 % max5. Fineness ...