... grade 1 Total phosphate, as P 2 O 5 %≥ 68.0 68.0 2Inactive phosphate,as P 2 O 5 %≤ 7.5 7.5 ... .001 7 Arsenic, as As, %≤ - 0.0003 8 Fluoride, as F, %≤ - 0.003 9 Water insoluble, %≤ 0.05 0.063.Sodium ... agent ffor water treatment. Application :For industrial use,such as oil field,paper-making,textile,dyeing,petrochemical industry,tanning industry,metallurgical ...