Detailed Product Description PHOSPHORIC ACID food/industrial grade Index item Food grade industryl gradeChroma %≤88Purity % ≥ 8585As (arsenic) PPM ≤0.51Heavy Metal PPM 510Chloride ,PPM ≤55Sulphate ,PPM ≤ 5050Fluoride PPM ≤ 10---Fe PPM ≤ ---- 20Oxide PPM ≤ 120 120Applications: used for treating activated carton and metal surfaces, feedstock of phosphate, catalyst for organic chemical reactions, ...