... , efflorescent in air, easily soluble in water, but insoluble in alcohol, its water solution is slightly alkaline, relative density at 1.52 g/cm3 ... fire-preventio agent for fabric, timber, and paper, also as water softening agent for boiler, food additive, buffering agent, solder, tanning ... .097.097.02P2O5 %≥49.049.019.219.23PH of 1% water solution8.5-10.08.5-10.08.8-9.28 ...