... ≥ 99Calcium OxideCaO% 39.0-42.0Phosphoric Anhydride P2O5 50.0-53.0Drying Loss, % ≤ 0.6Burning Loss,% 7.0-10.0PH Value: 5. ... 5-7.5Content Insoluble in Hydrochloric Acid:% ≤ 0. ... 2Carbonate, through experiment Chloride (by C1) Content, % ≤ 0.03Fluoride (F) Content, % ≤0.005Sulfide, through experimentArsenic ppm ...