... fire-prevention agent for fabric, timber, and paper, also as water softening agent for boiler, food additive, buffering agent ,solder, tanning ... % 98.0 98.0 2 PH of 1% water solution 8.5-10.0 8.8-9.2 3 ... 0003 7 Fluoride, as F % 0.005 0.005 8 Water insoluble % 0.10 0.10 9 Pb, % 0.0001 ... warehouse instead of in the open air, kept away from water, moisture and sunlight during transport, handled with care, so ...