... efflorescent in air,easily soluble in water,but insoluble in alcohol,water solution is slightly alkaline,relative ... for fabric,timber,and paper,also as water softening agent for boiler,food additive,buffering ... 0Phosphorus pent-oxide, % min19.419.4PH of 1% water solution .8.8-9.29.0-9.4Water insoluble, ... 002Sulfate,as SO4 % max-----0.25Chloride,as Cl. % max-----0.014Product picture:Other pictures: