... ≤0.250.50.55Heavy metal, as Pb% ≤0.0010.0010.0016Arsenic, as As% ≤0.00030.00030.00037Fluoride as F% ≤0.0050.0050.0058Water ... insoluble% ≤0.100.100.100.10Application:Tech grade:Used as a water softening agent, cleaning agent in electroplating, color ... as water-conservative in food industry. Applied to can, fruit drinks, milk product, meat product, cheese and drinks. 2012 hot selling Trisodium Phosphate ...